Cylinder 6 Fuel Injector Leak
The P02B1 code indicates that the engine control module (ECM) has detected a fuel injector leak on cylinder 6. This typically occurs when the injector fails to seal properly, allowing fuel to drip into the cylinder even when the injector is commanded off. This can lead to fuel dilution of engine oil, misfires, increased emissions, and potential catalytic converter damage. The leak may be internal (within the injector) or external (at the O-ring or fuel rail connection).
01. Most Common Causes
- Faulty fuel injector on cylinder 6
- Damaged or worn injector O-ring
- Cracked injector body or nozzle
- Contaminated fuel causing injector sticking
02. Symptoms You Will Notice
- Rough idle or misfire on cylinder 6
- Fuel smell from exhaust or oil
- Decreased fuel economy
- Check Engine Light illuminated
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Perform a fuel pressure leak-down test to confirm injector leak.
Step 3: Remove the intake manifold and inspect injector 6 for external leaks or damage.
Step 4: Swap injector 6 with another cylinder and see if the code follows the injector.
Step 5: If injector is faulty, replace it along with the O-ring and clean the fuel rail port.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with a leaking injector can cause engine misfires, fuel dilution of oil, and potential catalytic converter damage, leading to costly repairs.
How much does it cost to fix?▼
The cost typically ranges from $200 to $600, including parts (injector and O-ring) and labor. Labor is higher if the intake manifold must be removed.