P2B35A Camshaft Profile Actuator B Control Circuit High Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2B35 is the short-to-voltage counterpart for intake-side actuator B on bank 1, the second of the sleeve-shifting solenoids on camshaft A. In GM's L3B tables (2019 and again 2025) this test runs while the output is off: if the control line shows 0.5 Ω or less towards the controller supply, a short to power is assumed, and 4 hits in 5 samples set a Type A code with the warning lamp on in the same drive. A wire rubbing against a powered circuit in the harness or an internal short in the solenoid are typical reasons. Because the control line no longer behaves as commanded, the cam sleeve cannot be moved reliably and this actuator drops out of lift switching. Open and ground faults are covered by P2B33 and P2B34.
- What you may notice
- MIL on during the drive in which the fault appears
- Intake lift profile no longer changes as commanded
- Higher fuel use because cylinder deactivation is blocked
- Likely causes
- LikelyControl wire chafed against a powered circuit in the engine harness
- PossibleInternal short in actuator B
- RareOutput stage in the engine control module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.