Diesel Intake Air Flow Control Circuit Low
The P02E2 code indicates that the Engine Control Module (ECM) has detected a low voltage or resistance condition in the diesel intake air flow control circuit. This circuit typically controls an actuator or valve that regulates the amount of air entering the engine. A low circuit condition can be caused by a short to ground, a faulty actuator, or wiring issues. This can lead to reduced engine performance, increased emissions, and potential drivability problems.
01. Most Common Causes
- Faulty intake air flow control actuator
- Short to ground in the control circuit wiring
- Corroded or damaged connector
- ECM failure (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or hesitation
- Poor fuel economy
- Excessive exhaust smoke
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve the code and freeze frame data.
Step 2: Visually inspect the intake air flow control actuator and wiring for damage or corrosion.
Step 3: Test the actuator resistance and compare to manufacturer specifications.
Step 4: Check for shorts to ground or open circuits in the wiring harness.
Step 5: If all else is fine, replace the actuator and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause reduced performance and potential damage to other components. Have it diagnosed as soon as possible.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the part and labor rates.