Cylinder 5 Fuel Injector Leak
The P02AD code indicates that the engine control module (ECM) has detected a fuel injector leak on cylinder 5. This typically means the injector is stuck open or leaking fuel, causing an overly rich fuel mixture in that cylinder. This can lead to misfires, increased fuel consumption, and potential damage to the catalytic converter or engine.
1. Most Common Causes
- Fuel injector for cylinder 5 leaking internally or stuck open
- Damaged or leaking seat or seal on injector 5
- Injector 5 wiring shorted to voltage
- Corroded or bridged terminals in injector 5 electrical connector
- Internal failure of the injector driver within the PCM
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or misfire on cylinder 5
- Strong fuel smell from exhaust
- Decreased fuel economy
- Engine hesitation or poor acceleration
3. Step-by-Step Diagnosis
Step 1: Scan for codes and confirm P02AD is present.
Step 2: Perform a fuel pressure test to check for excessive leakdown.
Step 3: Use a noid light or injector test to verify injector electrical operation.
Step 4: Remove injector and inspect for physical damage or debris; perform a leak test.
Step 5: Replace injector if leaking; also replace O-rings and clean fuel rail if needed.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. A leaking injector can cause engine misfires, damage the catalytic converter, and lead to more costly repairs. Have it inspected as soon as possible.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a single injector replacement, including parts and labor. Prices may vary based on vehicle make and model.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.