Code
P0220
Generic
P — Powertrain
Throttle/Pedal Position Sensor/Switch B Circuit
AI status
Completed
Completed
100%
Causes
- Broken, corroded, or disconnected wiring or connectors in the TPS/PPS B circuit
- Faulty throttle position sensor (Sensor B) or pedal position sensor (when applicable)
- Short to battery or short to ground in the signal/reference circuit
- Poor sensor ground or reference voltage loss from the ECM
- Water intrusion or corrosion in the sensor/connector
- Intermittent wiring damage (pinch, chafe) or connector contamination
Symptoms
- Malfunction indicator lamp (MIL/Check Engine) illuminated
- Reduced engine power / limp-home mode may be activated
- Poor or hesitant acceleration and unpredictable throttle response
- Unstable or high/low idle in some cases
- Throttle/pedal position readings inconsistent or fixed when observed with scan tool
What to check
- Scan for stored and pending codes and record freeze-frame data
- Monitor live data for throttle/pedal position sensors A and B while operating throttle
- Visually inspect sensor connector and wiring for damage, corrosion, or water intrusion
- Perform wiggle test on wiring harness while observing live data for intermittent changes
- Backprobe sensor connector and confirm reference voltage, ground, and signal voltage with key on engine off
- Measure sensor signal voltage across throttle range — should change smoothly without dropouts
Signal parameters
- Reference voltage (Vref) from ECM: approximately 5.0 V (key ON) — verify exact spec for vehicle
- Sensor B signal voltage: typically about 0.5 V at closed throttle to ~4.5 V at wide open (changes smoothly with throttle)
- Sensor impedance: manufacturer-specific; expect stable resistance that changes with throttle position (measure only with connector disconnected and key off, following vehicle procedures)
- Both throttle/pedal sensors (A and B) should correlate and not show identical flat or erratic values
- No intermittent drops to 0 V or sudden spikes to battery voltage during steady throttle
Diagnostic algorithm
- Retrieve DTCs and freeze-frame data. Confirm P0220 and check for related codes (P0120–P0124, P0221–P0223, P2135, P2106).
- Inspect sensor connector, wiring harness, and nearby components for physical damage, corrosion, or water intrusion. Repair obvious faults.
- With ignition ON (engine OFF) backprobe connector: verify Vref (~5 V) at reference pin, good ground, and sensor signal present. Report measured voltages.
- Operate throttle/pedal while observing live data and signal voltage: ensure signal moves smoothly from closed to open throttle. Note any dropouts or stuck values.
- Perform wiggle test on wiring and connector while watching live data for intermittent faults. Repair or secure damaged wiring as needed.
- If signal is stuck at 0 V or battery voltage, check for short to ground or battery on signal wire and repair. If reference voltage is missing, trace and repair Vref supply from ECM or fuse circuit.
- If wiring, power and grounds are confirmed good but signal is incorrect or erratic, replace the throttle/pedal position sensor (Sensor B).
- After repair, clear codes, perform a relearn or calibration procedure if required by vehicle, then test drive and recheck for codes.
Likely causes
- Damaged/open/shorted wiring or poor connector connection at the sensor
- Faulty throttle/pedal position sensor (Sensor B)
- Corroded or contaminated connector causing intermittent signal
- Loss of sensor reference voltage or ground from ECM
Fault status
Status
Stored when the ECM detects an abnormal condition in the Throttle/Pedal Position Sensor B circuit (open, short, incorrect voltage, or implausible signal compared to expected values or Sensor A).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P0220
GWM
P — Powertrain
- Throttle Position Sensor Circuit Malfunction / Switch B
AI status
Completed
Completed
100%
Causes
- Broken, corroded, or disconnected wiring or connectors in the TPS/PPS B circuit
- Faulty throttle position sensor (Sensor B) or pedal position sensor (when applicable)
- Short to battery or short to ground in the signal/reference circuit
- Poor sensor ground or reference voltage loss from the ECM
- Water intrusion or corrosion in the sensor/connector
- Intermittent wiring damage (pinch, chafe) or connector contamination
Symptoms
- Malfunction indicator lamp (MIL/Check Engine) illuminated
- Reduced engine power / limp-home mode may be activated
- Poor or hesitant acceleration and unpredictable throttle response
- Unstable or high/low idle in some cases
- Throttle/pedal position readings inconsistent or fixed when observed with scan tool
What to check
- Scan for stored and pending codes and record freeze-frame data
- Monitor live data for throttle/pedal position sensors A and B while operating throttle
- Visually inspect sensor connector and wiring for damage, corrosion, or water intrusion
- Perform wiggle test on wiring harness while observing live data for intermittent changes
- Backprobe sensor connector and confirm reference voltage, ground, and signal voltage with key on engine off
- Measure sensor signal voltage across throttle range — should change smoothly without dropouts
Signal parameters
- Reference voltage (Vref) from ECM: approximately 5.0 V (key ON) — verify exact spec for vehicle
- Sensor B signal voltage: typically about 0.5 V at closed throttle to ~4.5 V at wide open (changes smoothly with throttle)
- Sensor impedance: manufacturer-specific; expect stable resistance that changes with throttle position (measure only with connector disconnected and key off, following vehicle procedures)
- Both throttle/pedal sensors (A and B) should correlate and not show identical flat or erratic values
- No intermittent drops to 0 V or sudden spikes to battery voltage during steady throttle
Diagnostic algorithm
- Retrieve DTCs and freeze-frame data. Confirm P0220 and check for related codes (P0120–P0124, P0221–P0223, P2135, P2106).
- Inspect sensor connector, wiring harness, and nearby components for physical damage, corrosion, or water intrusion. Repair obvious faults.
- With ignition ON (engine OFF) backprobe connector: verify Vref (~5 V) at reference pin, good ground, and sensor signal present. Report measured voltages.
- Operate throttle/pedal while observing live data and signal voltage: ensure signal moves smoothly from closed to open throttle. Note any dropouts or stuck values.
- Perform wiggle test on wiring and connector while watching live data for intermittent faults. Repair or secure damaged wiring as needed.
- If signal is stuck at 0 V or battery voltage, check for short to ground or battery on signal wire and repair. If reference voltage is missing, trace and repair Vref supply from ECM or fuse circuit.
- If wiring, power and grounds are confirmed good but signal is incorrect or erratic, replace the throttle/pedal position sensor (Sensor B).
- After repair, clear codes, perform a relearn or calibration procedure if required by vehicle, then test drive and recheck for codes.
Likely causes
- Damaged/open/shorted wiring or poor connector connection at the sensor
- Faulty throttle/pedal position sensor (Sensor B)
- Corroded or contaminated connector causing intermittent signal
- Loss of sensor reference voltage or ground from ECM
Fault status
Status
Stored when the ECM detects an abnormal condition in the Throttle/Pedal Position Sensor B circuit (open, short, incorrect voltage, or implausible signal compared to expected values or Sensor A).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P0220
HUMMER
P — Powertrain
APP Sensor 2 Circuit
AI status
Completed
Completed
100%
Causes
- Broken, corroded, or disconnected wiring or connectors in the TPS/PPS B circuit
- Faulty throttle position sensor (Sensor B) or pedal position sensor (when applicable)
- Short to battery or short to ground in the signal/reference circuit
- Poor sensor ground or reference voltage loss from the ECM
- Water intrusion or corrosion in the sensor/connector
- Intermittent wiring damage (pinch, chafe) or connector contamination
Symptoms
- Malfunction indicator lamp (MIL/Check Engine) illuminated
- Reduced engine power / limp-home mode may be activated
- Poor or hesitant acceleration and unpredictable throttle response
- Unstable or high/low idle in some cases
- Throttle/pedal position readings inconsistent or fixed when observed with scan tool
What to check
- Scan for stored and pending codes and record freeze-frame data
- Monitor live data for throttle/pedal position sensors A and B while operating throttle
- Visually inspect sensor connector and wiring for damage, corrosion, or water intrusion
- Perform wiggle test on wiring harness while observing live data for intermittent changes
- Backprobe sensor connector and confirm reference voltage, ground, and signal voltage with key on engine off
- Measure sensor signal voltage across throttle range — should change smoothly without dropouts
Signal parameters
- Reference voltage (Vref) from ECM: approximately 5.0 V (key ON) — verify exact spec for vehicle
- Sensor B signal voltage: typically about 0.5 V at closed throttle to ~4.5 V at wide open (changes smoothly with throttle)
- Sensor impedance: manufacturer-specific; expect stable resistance that changes with throttle position (measure only with connector disconnected and key off, following vehicle procedures)
- Both throttle/pedal sensors (A and B) should correlate and not show identical flat or erratic values
- No intermittent drops to 0 V or sudden spikes to battery voltage during steady throttle
Diagnostic algorithm
- Retrieve DTCs and freeze-frame data. Confirm P0220 and check for related codes (P0120–P0124, P0221–P0223, P2135, P2106).
- Inspect sensor connector, wiring harness, and nearby components for physical damage, corrosion, or water intrusion. Repair obvious faults.
- With ignition ON (engine OFF) backprobe connector: verify Vref (~5 V) at reference pin, good ground, and sensor signal present. Report measured voltages.
- Operate throttle/pedal while observing live data and signal voltage: ensure signal moves smoothly from closed to open throttle. Note any dropouts or stuck values.
- Perform wiggle test on wiring and connector while watching live data for intermittent faults. Repair or secure damaged wiring as needed.
- If signal is stuck at 0 V or battery voltage, check for short to ground or battery on signal wire and repair. If reference voltage is missing, trace and repair Vref supply from ECM or fuse circuit.
- If wiring, power and grounds are confirmed good but signal is incorrect or erratic, replace the throttle/pedal position sensor (Sensor B).
- After repair, clear codes, perform a relearn or calibration procedure if required by vehicle, then test drive and recheck for codes.
Likely causes
- Damaged/open/shorted wiring or poor connector connection at the sensor
- Faulty throttle/pedal position sensor (Sensor B)
- Corroded or contaminated connector causing intermittent signal
- Loss of sensor reference voltage or ground from ECM
Fault status
Status
Stored when the ECM detects an abnormal condition in the Throttle/Pedal Position Sensor B circuit (open, short, incorrect voltage, or implausible signal compared to expected values or Sensor A).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for HUMMER
138
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Code
P0220
MITSUBISHI
P — Powertrain
APS(main)
AI status
Completed
Completed
100%
Causes
- Broken, corroded, or disconnected wiring or connectors in the TPS/PPS B circuit
- Faulty throttle position sensor (Sensor B) or pedal position sensor (when applicable)
- Short to battery or short to ground in the signal/reference circuit
- Poor sensor ground or reference voltage loss from the ECM
- Water intrusion or corrosion in the sensor/connector
- Intermittent wiring damage (pinch, chafe) or connector contamination
Symptoms
- Malfunction indicator lamp (MIL/Check Engine) illuminated
- Reduced engine power / limp-home mode may be activated
- Poor or hesitant acceleration and unpredictable throttle response
- Unstable or high/low idle in some cases
- Throttle/pedal position readings inconsistent or fixed when observed with scan tool
What to check
- Scan for stored and pending codes and record freeze-frame data
- Monitor live data for throttle/pedal position sensors A and B while operating throttle
- Visually inspect sensor connector and wiring for damage, corrosion, or water intrusion
- Perform wiggle test on wiring harness while observing live data for intermittent changes
- Backprobe sensor connector and confirm reference voltage, ground, and signal voltage with key on engine off
- Measure sensor signal voltage across throttle range — should change smoothly without dropouts
Signal parameters
- Reference voltage (Vref) from ECM: approximately 5.0 V (key ON) — verify exact spec for vehicle
- Sensor B signal voltage: typically about 0.5 V at closed throttle to ~4.5 V at wide open (changes smoothly with throttle)
- Sensor impedance: manufacturer-specific; expect stable resistance that changes with throttle position (measure only with connector disconnected and key off, following vehicle procedures)
- Both throttle/pedal sensors (A and B) should correlate and not show identical flat or erratic values
- No intermittent drops to 0 V or sudden spikes to battery voltage during steady throttle
Diagnostic algorithm
- Retrieve DTCs and freeze-frame data. Confirm P0220 and check for related codes (P0120–P0124, P0221–P0223, P2135, P2106).
- Inspect sensor connector, wiring harness, and nearby components for physical damage, corrosion, or water intrusion. Repair obvious faults.
- With ignition ON (engine OFF) backprobe connector: verify Vref (~5 V) at reference pin, good ground, and sensor signal present. Report measured voltages.
- Operate throttle/pedal while observing live data and signal voltage: ensure signal moves smoothly from closed to open throttle. Note any dropouts or stuck values.
- Perform wiggle test on wiring and connector while watching live data for intermittent faults. Repair or secure damaged wiring as needed.
- If signal is stuck at 0 V or battery voltage, check for short to ground or battery on signal wire and repair. If reference voltage is missing, trace and repair Vref supply from ECM or fuse circuit.
- If wiring, power and grounds are confirmed good but signal is incorrect or erratic, replace the throttle/pedal position sensor (Sensor B).
- After repair, clear codes, perform a relearn or calibration procedure if required by vehicle, then test drive and recheck for codes.
Likely causes
- Damaged/open/shorted wiring or poor connector connection at the sensor
- Faulty throttle/pedal position sensor (Sensor B)
- Corroded or contaminated connector causing intermittent signal
- Loss of sensor reference voltage or ground from ECM
Fault status
Status
Stored when the ECM detects an abnormal condition in the Throttle/Pedal Position Sensor B circuit (open, short, incorrect voltage, or implausible signal compared to expected values or Sensor A).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for MITSUBISHI
406
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-
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- ES, AWD
- ES, FWD
- ES, FWD
- LE, AWD
- LE, AWD
- LE, FWD
- LE, FWD
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- SE, AWD
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- SEL, AWD
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- SEL, FWD
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