P2155 code meaning
Fuel Injector Group D Supply Voltage Circuit/Open
Powertrain system Generic code P21xx codes Check engine light
What P2155 means
P2155 is the open or general fault of the fourth shared injector supply. On GM's 2009 Duramax V8 group 4 joins injectors 8 and 3; an open, short or missing load for 6 ms sets the code, type A. The Passat VR6 of 2014 runs four supply groups and checks group D against a high-side current window of under 2.6 A or above 14.9 A. GM gasoline direct injection uses it for the high-side control line of cylinder 4. In the Saab 9-5 2.0T the supply lines are shared by cylinders 1 and 4, which is why a supply fault there stores P2146 and P2155 together (1 s, type B). The 2023–24 Corvette LT6 bulletin 24-NA-106 names P2155 among codes caused by water entering a wrong bank 2 connector. Rough running and misfire on the affected cylinders follow.
P2155 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2155
- Misfire on the group D cylinders
- Rough running and reduced power
- Check engine lamp on
Common causes of P2155
- Most likelyInjector harness damaged or wire open
- PossibleWater entering an injector harness connector
- PossibleOpen coil or piezo stack in an injector of the group
- Less likelyFaulty power stage in the engine control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel injectorInjector wiringEngine control module
What each part of P2155 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 1 | Area: fuel and air metering. |
| 55 | The exact fault in that area. |
What to do next
- Note P2155 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 P2155
What does P2155 mean?
P2155 means "Fuel Injector Group D Supply Voltage Circuit/Open". P2155 is the open or general fault of the fourth shared injector supply. It is a generic code, so it means the same on every make.
Is it safe to drive with P2155?
Drive gently and only to a workshop. With P2155 the car can go into limp mode (reduced power) to protect itself.
Will P2155 fail an emissions test?
Yes, it can. P2155 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 P2155 to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P2155 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.