P02D7: Cylinder 6 Fuel Injector A Offset Learning At Max Limit
What to do
Be wary of a repair that consists of clearing the code and resetting the adaptation. This fault means the engine module ran out of adjustment for a worn or restricted injector — resetting it does not change the injector, and the fault returns within a few hundred miles.
Ask for the trim figures on all six cylinders before agreeing to anything. If several are near their limits, doing them together is far cheaper than one at a time on a six-cylinder engine.
Ask whether cleaning and flow testing is worth trying, which can restore an injector restricted by deposits.
Mention the fuel filter's age and any history of poor fuel, since deposits are what narrow the spray holes.
What this code means
The correction the module applies to cylinder 6's injector has reached the top of its adjustment range.
Cylinder 6 under-delivers and the module has added all the correction it can.
This is the last member of the offset learning family, and it is a reasonable place to state the rule the whole family shares. These codes do not report a component failing. They report that the software's authority to hide a component failing has been exhausted — which means every one of them describes a fault that has been developing invisibly for a long time.
That has a consequence worth stating plainly: clearing the code and relearning the trims is not a repair. The adaptation will walk straight back to its limit, usually within a few hundred miles, because nothing about the hardware changed. A garage that clears these and hands the car back has deferred the problem rather than fixed it.
For this specific code, the ordinary under-delivery causes apply — a nozzle narrowed by deposits, a slow-opening actuator, a wrong calibration code, or restricted supply. On a six-cylinder engine the set-versus-single question matters most, because access and labour dominate the bill.
Ask for all six trims before deciding. It is the same advice as its siblings and it is the advice that most often changes the outcome.
Likely causes
Start here
- Blocked or restricted injector nozzle · specialist
- Contaminated or poor quality fuel · moderate
- Worn or leaking fuel injectors · specialist
Less common
- Injector fitted without entering its calibration code · specialist
- Restricted high pressure fuel pipe · moderate
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about P02D7.