P02D8
Cylinder 7 Fuel Injector A Offset Learning At Min Limit
Fuel injectors / calibration
Generic OBD-II
High
What it means
P02D8 means the ECM's fuel-injector offset ("learning") value for cylinder 7 has reached its minimum limit — the small correction the module applies to match that injector's characteristics has bottomed out. It usually points to an injector that's out of tolerance, a wiring or control-module fault, or calibration codes that weren't entered after a prior repair.
High
Can I keep driving? Usually driveable short-term, though cylinder 7 fueling may be slightly off; have it checked before it worsens.
Common symptoms
What you'll notice
- Check-engine light on
- Possible rough idle or slight misfire on cylinder 7
- Minor loss of power or change in fuel economy in some cases
Common causes
Most likely first
- Cylinder 7 injector worn or out of toleranceLikely
- Poor connection or damaged wiring at the injector or control moduleCommon
- Failed fuel-injector control module (FICM) or driverCommon
- Incorrect or missing injector calibration/coding after a prior repairLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame and check for related injector or fuel-system codes.
- Inspect the injector wiring, connector, and control-module grounds and supply voltage.
- Verify the injector calibration/IQA codes were entered correctly if an injector was recently replaced.
- Test injector performance (balance/return flow) and replace the cylinder 7 injector if out of spec.
- Clear the code, re-learn the injector offsets, and re-test.
FAQ
Quick answers
Is it safe to drive with P02D8?+
Usually short-term, though fueling to cylinder 7 may be slightly off. Have it checked before it worsens into a misfire or harder starting.
Can I just clear P02D8?+
If the injector or its coding is still out of range, the ECM hits the same learning limit again and resets the code.
Related codes
Often seen with P02D8
Read & clear P02D8 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