Cylinder 3 Injector Leaking
The P02A5 code indicates that the fuel injector for cylinder 3 is leaking, causing an imbalance in the air-fuel mixture. This can lead to misfires, rough idle, and increased emissions. The leak may be internal (dripping into the cylinder) or external (fuel seepage).
01. Most Common Causes
- Faulty fuel injector (stuck open or damaged seal)
- Contaminated fuel causing injector sticking
- Worn injector O-rings or seals
- Engine control module (ECM) injector driver circuit issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or engine misfire
- Poor fuel economy
- Fuel smell from exhaust or engine bay
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Perform a fuel injector balance test using a scan tool.
Step 3: Visually inspect injector for leaks and check electrical connector.
Step 4: Test injector resistance and compare to specifications.
Step 5: If injector is faulty, replace it and clear codes.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, driving with a leaking injector can cause engine damage, catalytic converter failure, and fire risk. It is best to have it repaired immediately.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a single injector replacement, including parts and labor, but may vary by vehicle.