P2654 code meaning
"B" Rocker Arm Actuator Control Circuit High (Bank 1)
Powertrain system Generic code P26xx codes Check engine light
What P2654 means
P2654 reports a voltage that is too high on the wire that drives rocker solenoid B, bank 1, typically when the line touches a battery-fed wire or the driver's ground side is bridged. With a ground-switched solenoid, that kind of short can energise the valve permanently, so the B stage may stay engaged regardless of the command, which the engine feels as rough idle or misfire at low speed. No carmaker publishes this code with details. GM checks the matching A circuit (P2649) on its 2015 four-cylinders using an output test that needs at least 11 V and declares a Type A fault once 100 of 120 checks fail. CARB counts a short to power among the circuit faults a lift system must catch. Related: P2653 for the low side, P2650 for an open circuit, P2664 on bank 2.
P2654 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2654
- MIL on
- Rough idle or misfire if the B stage stays engaged
- Possible blown fuse on the solenoid supply
Common causes of P2654
- Most likelySolenoid B control wire shorted to a battery-fed circuit
- PossibleInternal short in solenoid B lowering its resistance
- Less likelyShorted output transistor 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
Rocker arm actuator b b1Oil control valveWiring harness
What each part of P2654 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| 54 | The exact fault in that area. |
What to do next
- Note P2654 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 P2654
What does P2654 mean?
P2654 means ""B" Rocker Arm Actuator Control Circuit High (Bank 1)". P2654 reports a voltage that is too high on the wire that drives rocker solenoid B, bank 1, typically when the line touches a battery-fed wire or the driver's ground side is bridged. It is a generic code, so it means the same on every make.
Is it safe to drive with P2654?
Drive gently and only to a workshop. With P2654 the car can go into limp mode (reduced power) to protect itself.
Will P2654 fail an emissions test?
Yes, it can. P2654 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 P2654 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2654 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.