P02D5
Cylinder 5 Fuel Injector A Offset Learning At Max Limit
Fuel injection
Generic OBD-II
High
What it means
P02D5 means the ECM's learned fueling correction for cylinder 5's injector has reached its maximum limit — the computer has adjusted that injector as far as it's allowed and still can't bring it into balance. It usually points to an injector that's worn or out of spec, or a wiring/fuel-delivery issue affecting it. The engine may run slightly rough or down on power but still starts.
High
Can I keep driving? Usually drivable — the ECM's learned correction for cylinder 5's injector has maxed out, which may cause rough running or lost power. Have it diagnosed.
Common symptoms
What you'll notice
- Check-engine light on
- Rough idle or slight vibration
- Reduced power
- Possible misfire feel from cylinder 5
Common causes
Most likely first
- Worn or out-of-spec injector on cylinder 5Likely
- Wiring or connector fault at the cylinder 5 injectorCommon
- Low or uneven fuel pressure/delivery to that injectorCommon
- Faulty injector control moduleLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check the cylinder 5 injector correction/offset values with a scan tool.
- Inspect the injector connector and wiring for opens, corrosion, or poor contact.
- Test the injector electrically and, where supported, verify its coding/calibration data.
- Check fuel pressure and delivery to rule out a supply problem.
- Replace the out-of-spec injector (and program its code if required); suspect the control module last.
FAQ
Quick answers
Is it safe to drive with P02D5?+
Short-term, usually — but the injector is drifting out of spec and can cause rough running. Get it diagnosed before it worsens or fouls the cylinder.
Can I just clear P02D5?+
It returns once the ECM's learned correction hits the maximum again. The injector or its wiring has to be fixed.
Related codes
Often seen with P02D5
Read & clear P02D5 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