P2E69 code meaning
System Too Rich During Cylinder Deactivation Bank 1
Powertrain system Generic code P2Exx codes Check engine light
What P2E69 means
P2E69 is the rich mirror of P2E68: with cylinders deactivated, bank 1 has to pull fuel out beyond the permitted range. In GM's 19OBDG07 tables for the 4.2-litre twin-turbo V8 the separate long-term trim factor learned for deactivation mode must drop below 0.77 and stay steady; it shares the enable logic of P2E68 and is Type B, MIL on the second trip. A Ford patent on variable displacement V8s shows how such a rich shift arises: if one cylinder fails to deactivate, air blows through it, the airflow meter reports more air, fuel rises accordingly, and the bank that is working normally runs rich. A leaking injector on a firing cylinder or a fuel-diluted crankcase can do the same. The running-mode rich codes are separate.
P2E69 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyHard
- Typical labor1 to 8 hours
- Clears after repairAfter a drive cycle
Symptoms of P2E69
- Check engine light after two trips
- Higher fuel use, possible fuel smell
- Rough running in deactivation mode
Common causes of P2E69
- Most likelyA cylinder that should be off still breathing, so measured airflow and fuel delivery are too high
- PossibleLeaking or dribbling direct injector on bank 1
- PossibleFuel vapour from diluted oil or a stuck-open purge valve
- Less likelyBank 1 oxygen sensor reading biased lean
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel injectorsDeactivation solenoidsIntake system
What each part of P2E69 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 69 | The exact fault in that area. |
What to do next
- Note P2E69 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2E69
What does P2E69 mean?
P2E69 means "System Too Rich During Cylinder Deactivation Bank 1". P2E69 is the rich mirror of P2E68: with cylinders deactivated, bank 1 has to pull fuel out beyond the permitted range. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E69?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2E69 fail an emissions test?
Yes, it can. P2E69 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2E69 to fix?
Difficulty: hard. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P2E69 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.