P2E6A code meaning
System Too Lean During Cylinder Deactivation Bank 2
Powertrain system Generic code P2Exx codes Check engine light
What P2E6A means
P2E6A applies the lean test to bank 2, the cylinder row without cylinder 1. GM sets it on the 4.2-litre twin-turbo V8 of the 2019 table 19OBDG07 when the trim factor learned for deactivation mode on bank 2 exceeds 1.23 while stable; Type B. The engine closes the valves of four cylinders and fires in the order 1-4-6-7, so on GM's odd/even bank split only cylinders 4 and 6 keep working on bank 2, and a single weak injector there weighs heavily. A separate camshaft-driven high-pressure pump feeds each bank, so a pump problem can also stay on one side. CARB requires the fuel system to be watched for any fault that pushes emissions over the limits. A lean trim on both banks during deactivation points to a shared cause such as an intake leak.
P2E6A 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 P2E6A
- Check engine light after two trips
- Hesitation at light load in deactivation mode
- Often no noticeable change in normal driving
Common causes of P2E6A
- Most likelyWeak injector on cylinder 4 or 6, which carry bank 2 in deactivation mode
- PossibleBank 2 high-pressure fuel pump delivering too little
- PossibleDeactivating rocker on bank 2 letting air pass into the exhaust
- Less likelyExhaust leak ahead of the bank 2 oxygen sensor
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 P2E6A means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6A | The exact fault in that area. |
What to do next
- Note P2E6A 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 P2E6A
What does P2E6A mean?
P2E6A means "System Too Lean During Cylinder Deactivation Bank 2". P2E6A applies the lean test to bank 2, the cylinder row without cylinder 1. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E6A?
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 P2E6A fail an emissions test?
Yes, it can. P2E6A 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 P2E6A to fix?
Difficulty: hard. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P2E6A 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.