Code
P02E2
Generic
P — Powertrain
Diesel Intake Air Flow A Control Circuit Low
Views:
UK: 20
EN: 29
RU: 26
AI status
Completed
Completed
100%
Causes
- Short to ground in the intake air flow control circuit
- Open or high-resistance wiring or connector
- Poor connector pin contact or corrosion
- Failed intake air flow control actuator/solenoid/valve
- Blown fuse or loss of supply voltage to the circuit
- ECM internal fault or software issue
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Reduced engine power or entry into limp mode
- Poor throttle response or turbo lag on diesel engines
- Rough idle or stalling
- Degraded fuel economy and increased smoke from exhaust
- Intake flap may be stuck open or closed (possible abnormal intake noise)
What to check
- Read freeze-frame and live data with a scan tool; note related codes and actuator status
- Visual inspection of harness and connector for damage, corrosion, or water ingress
- Check fuses and relays related to intake air control circuit and ECM power
- Back-probe connector and measure supply voltage, ground continuity and control signal with key ON and during commanded operation
- Measure resistance of the actuator/solenoid (compare to OEM spec) and check for short to ground
- Wiggle test wiring while monitoring live data to reveal intermittent faults
Signal parameters
- Control circuit expected behavior: voltage or PWM duty change when ECM commands flow change (consult OEM for exact values)
- Low-fault condition: signal present near 0 V or below expected threshold when a higher voltage/duty is commanded
- Typical control range (generic): 0–12 V or 0–100% PWM duty; actual system may use 5 V reference or dedicated driver—check OEM data
- Actuator coil resistance (generic example): small solenoids often 5–50 ohms but check the specific component specification
- Current draw increases if actuator is shorted or binding; compare measured current to specification
Diagnostic algorithm
- Retrieve and record all stored codes and freeze-frame data. Check for related intake, turbo, or injection codes.
- Clear codes and attempt to reproduce the fault with a road or static test while monitoring live data for the intake air flow actuator status.
- Visually inspect the actuator, connector and harness for damage, corrosion, heat, or contaminants. Repair obvious issues.
- With key ON (engine OFF), back-probe connector: verify reference/supply voltage and ground presence at the connector. No supply = check fuses/relays and wiring to power source.
- Command the actuator with a scan tool (if supported) and observe signal voltage/PWM and physical movement. Note if commanded and no voltage change (low) or no movement.
- Measure resistance of the actuator/solenoid. If resistance is very low (short) or infinite (open), replace actuator. If resistance within range but no operation, bench-test with proper supply per OEM guidance.
- Check for short to ground in the control wire: disconnect actuator and measure continuity from the control pin to ground. If shorted, isolate and repair wiring.
- Wiggle harness and connectors while monitoring to detect intermittent faults. Repair or replace damaged wiring or connectors.
- After repairs, clear codes and perform verification drive or exercise intake system. Re-scan to confirm code does not return.
- If wiring and actuator check good and issue persists, consider ECM diagnostics or reprogramming per manufacturer procedures.
Likely causes
- Damaged wiring or connector (abraded insulation, chafing to ground)
- Failed control valve or actuator on intake air flow A
- Connector corrosion or bent pins causing intermittent/low voltage
- Blown fuse or relay supplying the intake air flow circuit
- Mechanical obstruction or seized flap causing abnormal electrical load
Fault status
Status
P02E2 — Diesel Intake Air Flow A Control Circuit Low: ECM detected low voltage or short-to-ground condition in the intake air flow control actuator/solenoid circuit for bank A. Possible wiring, connector, actuator, fuse or ECM issue.
Repair difficulty: Medium
Diagnostic time: 1.0 - 2.5 hours
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Code
P02E2
LAND ROVER
P — Powertrain
Diesel intake air flow control - Low circuit
Views:
UK: 11
EN: 17
RU: 15
AI status
Completed
Completed
100%
Causes
- Short to ground in the intake air flow control circuit
- Open or high-resistance wiring or connector
- Poor connector pin contact or corrosion
- Failed intake air flow control actuator/solenoid/valve
- Blown fuse or loss of supply voltage to the circuit
- ECM internal fault or software issue
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Reduced engine power or entry into limp mode
- Poor throttle response or turbo lag on diesel engines
- Rough idle or stalling
- Degraded fuel economy and increased smoke from exhaust
- Intake flap may be stuck open or closed (possible abnormal intake noise)
What to check
- Read freeze-frame and live data with a scan tool; note related codes and actuator status
- Visual inspection of harness and connector for damage, corrosion, or water ingress
- Check fuses and relays related to intake air control circuit and ECM power
- Back-probe connector and measure supply voltage, ground continuity and control signal with key ON and during commanded operation
- Measure resistance of the actuator/solenoid (compare to OEM spec) and check for short to ground
- Wiggle test wiring while monitoring live data to reveal intermittent faults
Signal parameters
- Control circuit expected behavior: voltage or PWM duty change when ECM commands flow change (consult OEM for exact values)
- Low-fault condition: signal present near 0 V or below expected threshold when a higher voltage/duty is commanded
- Typical control range (generic): 0–12 V or 0–100% PWM duty; actual system may use 5 V reference or dedicated driver—check OEM data
- Actuator coil resistance (generic example): small solenoids often 5–50 ohms but check the specific component specification
- Current draw increases if actuator is shorted or binding; compare measured current to specification
Diagnostic algorithm
- Retrieve and record all stored codes and freeze-frame data. Check for related intake, turbo, or injection codes.
- Clear codes and attempt to reproduce the fault with a road or static test while monitoring live data for the intake air flow actuator status.
- Visually inspect the actuator, connector and harness for damage, corrosion, heat, or contaminants. Repair obvious issues.
- With key ON (engine OFF), back-probe connector: verify reference/supply voltage and ground presence at the connector. No supply = check fuses/relays and wiring to power source.
- Command the actuator with a scan tool (if supported) and observe signal voltage/PWM and physical movement. Note if commanded and no voltage change (low) or no movement.
- Measure resistance of the actuator/solenoid. If resistance is very low (short) or infinite (open), replace actuator. If resistance within range but no operation, bench-test with proper supply per OEM guidance.
- Check for short to ground in the control wire: disconnect actuator and measure continuity from the control pin to ground. If shorted, isolate and repair wiring.
- Wiggle harness and connectors while monitoring to detect intermittent faults. Repair or replace damaged wiring or connectors.
- After repairs, clear codes and perform verification drive or exercise intake system. Re-scan to confirm code does not return.
- If wiring and actuator check good and issue persists, consider ECM diagnostics or reprogramming per manufacturer procedures.
Likely causes
- Damaged wiring or connector (abraded insulation, chafing to ground)
- Failed control valve or actuator on intake air flow A
- Connector corrosion or bent pins causing intermittent/low voltage
- Blown fuse or relay supplying the intake air flow circuit
- Mechanical obstruction or seized flap causing abnormal electrical load
Fault status
Status
P02E2 — Diesel Intake Air Flow A Control Circuit Low: ECM detected low voltage or short-to-ground condition in the intake air flow control actuator/solenoid circuit for bank A. Possible wiring, connector, actuator, fuse or ECM issue.
Repair difficulty: Medium
Diagnostic time: 1.0 - 2.5 hours
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Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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👍 Like
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Send to email