P2658 code meaning
"A" Rocker Arm Actuator Control Circuit Low (Bank 2)
Powertrain system Generic code P26xx codes Check engine light
What P2658 means
P2658 flags the bank 2 control line of rocker arm actuator A as too low, the classic sign of a short to ground or a coil with damaged windings. The test is purely electrical and runs whenever the controller drives the output, regardless of oil condition. No manufacturer documents P2658 publicly; GM's equivalent for bank 1 (P2648 in 15OBDG05) needs more than 11 V and 100 failures out of 120 samples, Type A. Inspect the bank 2 solenoid connector, harness clips near the exhaust manifold and the coil resistance. If only one bank can switch, the controller may disable the feature altogether, leaving reduced power or economy.
P2658 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 P2658
- MIL on immediately
- Lift switching disabled
- Less power or higher consumption
Common causes of P2658
- Most likelyBank 2 control wire shorted to ground
- PossibleDamaged winding in the bank 2 solenoid
- Less likelyHarness insulation damaged by exhaust heat
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Rocker arm actuator a b2Oil control valveWiring harness
What each part of P2658 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. |
| 58 | The exact fault in that area. |
What to do next
- Note P2658 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 P2658
What does P2658 mean?
P2658 means ""A" Rocker Arm Actuator Control Circuit Low (Bank 2)". P2658 flags the bank 2 control line of rocker arm actuator A as too low, the classic sign of a short to ground or a coil with damaged windings. It is a generic code, so it means the same on every make.
Is it safe to drive with P2658?
Drive gently and only to a workshop. With P2658 the car can go into limp mode (reduced power) to protect itself.
Will P2658 fail an emissions test?
Yes, it can. P2658 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 P2658 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 P2658 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.