Fuel and air

P02DE — Cylinder 10 Injector Offset Learning at Minimum Limit

Severity: medium Drive with care, to a shop

What P02DE means

The engine control module constantly trims each injector so all cylinders get an equal fuel mixture, and it stores that correction as a learned offset. P02DE means the offset for the cylinder 10 injector has reached its lowest allowed value. The injector is delivering more fuel than expected and the ECM cannot reduce it any further.

Symptoms

  • Check Engine Light on
  • Rough idle
  • Hesitation or stumbling on acceleration
  • Reduced power
  • Higher fuel consumption
  • Fuel smell from the exhaust
  • Possible misfire

Possible causes

  1. Leaking or dirty cylinder 10 injector
  2. Worn or sticking injector needle
  3. Poor connection or damaged wiring at the injector connector
  4. Fuel pressure too high from a faulty regulator or sensor
  5. ECM software or hardware fault (rare)
  6. Mechanical problem in cylinder 10, such as low compression
  7. Air leak or other issue skewing the mixture

How to diagnose

  1. Read all codes and freeze frame data, and look for other injector or fuel trim codes
  2. View fuel trims and injector learned offsets by cylinder
  3. Inspect the cylinder 10 injector connector and harness for corrosion, chafing and a loose fit
  4. Test injector resistance and the drive signal with a scope or noid light
  5. Measure fuel pressure and compare it with specification
  6. Run a cylinder balance test and check compression on cylinder 10
  7. Check for vacuum or intake air leaks
  8. Swap the injector with a neighboring cylinder to see if the code follows

Common fixes

  • Clean or replace the cylinder 10 injector
  • Repair the injector wiring or connector
  • Correct fuel delivery by replacing a faulty pressure regulator, sensor or filter
  • Fix any air leaks
  • Reset the learned values and clear the code after repair; reflash or replace the ECM only if it is confirmed faulty

Questions and answers

What does P02DE mean?

The ECM has trimmed the cylinder 10 injector to its minimum learned offset and cannot reduce fuel any further. Usually the injector is delivering too much fuel or there is a problem in its circuit.

Can I drive with code P02DE?

Short trips are usually fine if the engine runs smoothly. Extended driving risks catalytic converter damage and extra engine wear, so diagnose it soon.

How do I clear P02DE?

A scan tool can erase the code, but it will return unless the cause is fixed. Check the injector, wiring and fuel pressure first, then reset the learned values.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.