P02A0
Cylinder 2 - Injector Restricted
Fuel injection — cylinder 2
Generic OBD-II
High
What it means
P02A0 means the ECM has determined that the cylinder 2 fuel injector is restricted — it can't flow enough fuel, usually from deposits, contamination, or wear. The result is a lean condition or misfire on that cylinder, showing up as rough running and reduced power rather than a no-start.
High
Can I keep driving? Drivable but not ideal — cylinder 2 runs lean or misfires from restricted fuel flow. Sustained misfiring can damage the catalytic converter, so repair it soon.
Common symptoms
What you'll notice
- Check-engine light on
- Rough idle or misfire on cylinder 2
- Reduced power and hesitation
- Hard starting when cold
Common causes
Most likely first
- Clogged or restricted cylinder 2 injector (deposits or debris)Likely
- Contaminated or poor-quality fuelCommon
- Injector wear reducing its flow rateCommon
- Low fuel pressure affecting delivery to that injectorLess often
- Debris from a failing fuel filter or tankLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the misfire/lean condition is isolated to cylinder 2.
- Try a quality fuel-injector cleaner and a tank of fresh fuel to clear light deposits.
- Verify fuel pressure is within spec.
- Perform an injector flow/balance test; clean or replace the cylinder 2 injector if it's restricted.
- Replace a dirty fuel filter, then clear the code and re-test.
FAQ
Quick answers
Is it safe to drive with P02A0?+
Short-term yes, but a restricted injector makes that cylinder run lean or misfire, and sustained misfiring can damage the catalytic converter. Fix it promptly.
Can I just clear P02A0?+
It returns as long as the injector stays restricted. Clean or replace the injector rather than only clearing the code.
Related codes
Often seen with P02A0
Read & clear P02A0 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX