P2B38A Camshaft Profile Actuator B Control Circuit High Bank 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2B38 marks a short to battery voltage in the control circuit of intake camshaft actuator B on bank 2. No published manufacturer documentation uses it; only the bank 1 version P2B35 is covered, by GM's L3B summary tables, which check with the output off and react to 0.5 Ω or less towards supply. Engines with two banks and stepped valve lift, such as V6 designs with sliding cam pieces on the inlet side, are the only possible carriers. Under the CARB rules for output components, a short to high voltage has to be recognised and reported. A pinched wire touching a live circuit or a solenoid with an internal short are the likely findings; the second bank then keeps its current cam profile instead of switching.
- What you may notice
- Check engine light on
- Bank 2 intake lift no longer changes, uneven power delivery
- Likely causes
- LikelyPinched or chafed control wire touching a powered circuit
- PossibleInternal short in actuator B
- RareFaulty output stage in the engine module
- 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 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.