Cylinder 7 Fuel Injector A Offset Learning At Max Limit
What it means
P02D9 means the adaptive correction the ECM learns for cylinder 7's fuel injector has reached its maximum limit — the injector has drifted enough that the software can no longer fully compensate. It usually points to a worn injector or incorrect injector calibration coding, and sometimes a wiring or control-module fault. The engine runs rough and down on power, so the injector should be tested, recoded, or replaced.
Can I keep driving? Driveable but degraded — the ECM's learned correction for cylinder 7's injector has maxed out, so expect rough running and reduced power until it's addressed.
Common symptoms
What you'll notice
- Check-engine light on
- Rough idle or uneven running
- Reduced power or performance
- Possible hard starting (diesel/direct-injection)
Common causes
Most likely first
- Worn or out-of-spec cylinder-7 fuel injector (correction maxed out)Likely
- Incorrect or missing injector calibration/coding for cylinder 7Common
- Wiring or connector fault at the injectorCommon
- Fuel injector control module (FICM) supply, ground, or circuit faultLess often
- Faulty ECM (least likely)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and the injector correction/offset PIDs to confirm cylinder 7 is at its max limit.
- Verify the correct injector calibration/trim code is programmed for cylinder 7.
- Inspect the injector and FICM wiring, connectors, supply voltage, and grounds.
- Test the cylinder-7 injector's electrical and delivery performance.
- Replace or recode the injector as needed. Clear the adaptations and re-test.
FAQ
Quick answers
Is it safe to drive with P02D9?+
Can I just clear P02D9?+
Related codes
Often seen with P02D9
Read & clear P02D9 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.