P02D0
Cylinder 3 Fuel Injector A Offset Learning At Min Limit
Fuel injection — cylinder 3
Generic OBD-II
High
What it means
P02D0 means the ECM's learned fuel-injection correction (offset) for cylinder 3 has reached its minimum limit, so it can no longer compensate for that injector's behavior. It usually points to a worn or drifting injector or a circuit issue, and often shows up only as a warning light before it develops into rougher running or a misfire.
High
Can I keep driving? Usually drivable — the ECM can no longer trim cylinder 3's injector, which may cause slightly rough running or reduced power. Have it checked before it worsens.
Common symptoms
What you'll notice
- Check-engine light on
- Often no obvious symptom beyond the light
- Slightly rough idle or reduced power
- Possible cylinder 3 misfire or balance fault in severe cases
Common causes
Most likely first
- Worn or drifting cylinder 3 injector outside its learnable rangeLikely
- Injector or fuel delivery that has changed from its expected characteristicCommon
- Wiring or connector fault at the injector affecting its responseCommon
- Fuel injector control module or its supply/ground circuit faultLess often
- Faulty ECM (least likely)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check for companion injector or misfire codes on cylinder 3.
- Inspect the cylinder 3 injector connector, wiring, and grounds for damage or corrosion.
- Verify fuel pressure and the injector's coil resistance against spec.
- Test the injector control module's supply voltage and ground circuits.
- Replace the worn injector if it's out of its learnable range, then reset the injector learning and re-test.
FAQ
Quick answers
Is it safe to drive with P02D0?+
Usually yes for a short time, but the ECM has run out of adjustment for that injector, so cylinder 3 may run slightly off. Have it diagnosed before it develops into a misfire.
Can I just clear P02D0?+
It comes back once the ECM relearns and hits the limit again. The underlying injector or circuit needs attention, and injector learning may need resetting after repair.
Related codes
Often seen with P02D0
Read & clear P02D0 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