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
- Damaged or corroded connector at intake air flow control actuator/valve
- Broken, shorted or open wiring in power, ground or signal circuit
- Failed intake air flow control actuator/valve (stuck or electrically open)
- Blown fuse or poor power supply to the circuit
- Poor or missing ground at the actuator
- Excessive carbon or mechanical binding preventing movement
Symptoms
- Check Engine MIL illuminated (Limp mode possible)
- Reduced engine power or poor drivability
- Rough idle or stalling at low speed
- Reduced turbo response, increased smoke or poor fuel economy
- Stored intake air flow control related diagnostic trouble codes
What to check
- Read and record freeze-frame and all stored codes with a scan tool; note MIL status
- Visually inspect actuator, connector and wiring for corrosion, damage, pin push-out or contamination
- Check fuses and relays related to intake control/engine management power supplies
- Back-probe actuator connector and measure supply voltage and ground with ignition ON (engine OFF)
- Monitor live data/command and feedback for the intake air control on a diagnostic scanner while commanding valve positions
- Wiggle harness while monitoring signal to look for intermittent faults
Signal parameters
- Control signal typically is a switched supply or PWM command from the ECM (0–100% duty or 0–12 V range depending on design)
- Position/feedback sensor (if fitted) typically reports 0–5 V proportional to flap position
- Actuator coil/solenoid DC resistance often in the low ohms to low tens of ohms range (check manufacturer spec)
- Expected behavior: commanded movement should produce a corresponding feedback change and no open/short to ground/voltage
Diagnostic algorithm
- Connect a diagnostic scanner, read and record all codes and live data related to intake control and related sensors (MAF, MAP, boost).
- Attempt an active test to command the intake air flow control (open/close) while observing feedback. Note response and any error messages.
- Visually inspect wiring and connectors for damage, corrosion, or water ingress. Repair any obvious faults.
- With ignition ON (engine OFF), back-probe the actuator connector: verify reference voltage/supply, ground continuity, and presence of ECM command signal (voltage or PWM).
- Measure actuator coil resistance and compare to manufacturer specification. Replace actuator if out of spec or not responding to bench/vehicle commands.
- If supply/ground/command are correct but actuator does not move, remove and bench-test or replace the actuator. If actuator works off the vehicle, re-check harness and ECM connections.
- If wiring or connectors fail continuity or show short/ground, repair wiring harness; if wiring checks good and command never appears, suspect ECM driver—consult manufacturer guidance before replacing ECM.
- After repair, clear codes, perform functional test and road test to confirm issue is resolved. Re-scan for any remaining codes.
Likely causes
- Corroded/loose connector at the intake air control actuator
- Failed actuator/solenoid internally
- Wiring short to ground or open circuit between ECM and actuator
- Blown fuse or missing supply voltage
Fault status
Status
Intake air flow control – Low circuit. The ECM has detected a lower-than-expected electrical signal or lack of proper response from the intake air flow control actuator/valve circuit. Investigate wiring, power/ground and actuator operation.
Repair difficulty: Medium
Diagnostic time: 1.5 - 3.0 hours
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