P1113
Intake Resonance Switchover Valve Circuit
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Intake Resonance Switchover Valve Circuit
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Intake Resonance Switchover Valve Circuit
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Intake Resonance Switchover Valve Circuit
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Fuel pressure regulation
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
MDP SNSR - PERFORMANCE MAL
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Fuel pressure regulation
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Intake Resonance Switchover Valve Circuit
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Intake Resonance Switchover Valve Circuit
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Intake Resonance Switchover Solenoid Control Circuit
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Boost Temperature Sensor Circuit High
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Intake Air Temperature Sensor 2 high input
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
Repair manuals for LAND ROVER
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualP1113
Intake Air Temperature Sensor Signal Dynamic Chamber Circuit
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Intake Resonance Switchover Valve Circuit
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
IAT Sensor Open/Short
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
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AUDI 11
6-speed manual gearbox 0B1, front-wheel drive — Workshop Manual (Edition 05.2014)
Workshop ManualAudi A3 (1997) – 1.6L 4-cylinder (2‑valve) Engine Mechanical Components Service Manual (AEH, AKL, APF) – Edition 07.2002
Workshop ManualAUDI A3 (2004) Workshop Manual — 2.0L FSI Turbo (4‑cyl, 4‑valve) Engine, Mechanics — Edition 03.2017
Workshop ManualAudi A3 2004 — Electrical System (Workshop Manual, Edition 02.2018)
Workshop ManualAudi A4 / A4 Cabriolet – 4.2 l V8 (5‑valve, timing chains) – Workshop Manual (Mechanics) – Edition 04.2007
Workshop ManualAudi A4 / A4 Cabriolet — Auxiliary Heater Workshop Manual (Edition 08.2004)
Workshop ManualAudi A4 / A4 Cabriolet (1.8T 4‑cyl turbo) — Motronic Injection & Ignition System Service Manual (Edition 01.2015)
Workshop ManualAudi A8 (2003) — Electrical System Workshop Manual (Edition 08.2014)
Workshop ManualAudi Q4 e-tron (Type F4) - Self-study Programme SSP 685
Workshop ManualAudi Q8 (2018) — Electrical System Workshop Manual (Edition 05.2019)
Workshop ManualAudi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)
Workshop ManualLAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualP1113
Fuel pressure regulation
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Intake Resonance Switchover Valve Circuit
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
Fault status
Similar codes
P1113
Oxygen Sensor Heater Resistance Too High Bank 1 Sensor 1
Causes
- Open or shorted wiring in the resonance/runner valve control circuit
- Corroded, loose, or damaged connector or terminals at the valve
- Failed intake resonance switchover valve (solenoid/actuator)
- Blown fuse or faulty relay supplying the circuit (if applicable)
- Water intrusion or debris in connector/wiring
- ECM driver fault (rare) or poor ground
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine performance or diminished midrange torque
- Hesitation or stumble on acceleration
- Erratic idle or mild roughness
- Possible reduced fuel economy
- Intake runner resonance not engaging (may be noticed as changed engine sound)
What to check
- Scan for stored/active codes and capture freeze-frame data
- Check live data / commanded state for the intake resonance valve with a scan tool
- Perform a careful visual inspection of the valve, connector, and wiring for damage or corrosion
- Backprobe the connector with key ON and engine OFF to verify supply voltage and ground reference
- Measure coil resistance of the valve solenoid and compare to specification
- Check continuity and resistance between valve connector and ECM pin (with power removed)
Signal parameters
- Supply voltage at valve harness pin: approximately battery voltage with key ON (check spec)
- Control signal: ECM typically switches ground/pulse to control solenoid — expect pulsed ground when commanded
- Solenoid coil resistance: check service information; typical intake solenoids often measure in the low tens of ohms (verify before replacing)
- No continuity to ground on the control pin when valve is not commanded (depends on design)
- Commanded state should change live-data bit/position when valve is driven by scan tool
Diagnostic algorithm
- Retrieve codes and freeze frame with a scan tool; note when the fault occurred (conditions).
- Visually inspect the valve, mounting, connector, and harness for damage, corrosion, or water entry. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify battery supply at the power feed pin and check the control pin for correct reference/ECM connection.
- Measure solenoid coil resistance (with harness disconnected). Compare to the vehicle/service specification; replace if open or out of spec.
- Check continuity between the valve connector pins and the ECM connector pins with power off. Repair any open or high-resistance wiring.
- If wiring checks OK, command the valve ON/OFF using a scan tool while monitoring voltage at the connector to verify the ECM is switching the circuit and the valve responds.
- If the valve does not respond to commanded activation but bench-testing the valve (apply proper voltage/ground) operates it, focus on harness/ECM wiring repair.
- If bench-tested valve fails, replace the resonance switchover valve/solenoid and re-test.
- After repairs, clear codes, perform operational test drive and re-scan to confirm the fault does not return and readiness is restored.
- If wiring and valve test good but code returns, check fuses/relays and consider ECM driver fault — consult advanced diagnostics/service manual before ECM replacement.
Likely causes
- Broken/chafed harness wire to the valve
- Corroded or worn connector causing intermittent contact
- Failed solenoid coil (open or high resistance)
- Valve stuck mechanically and drawing abnormal current
- Short to battery/ground caused by damaged insulation
- Faulty ECM output transistor (last resort after harness/valve verified)
