P02A0

Cylinder 2 - Injector Restricted

Q: 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.

Q: 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.

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.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P02A0 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX