P2B37A Camshaft Profile Actuator B Control Circuit Low 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
- Code P2B37 stands for a control line shorted to ground at intake-side actuator B of bank 2, the second lobe-switching solenoid on camshaft A of the other cylinder bank. Publicly, no maker assigns it to a vehicle. The bank 1 analogue P2B34 is defined by GM for the L3B four-cylinder, which flags a ground short at 0.5 Ω or less while the output is on; a V engine would need a mirror-image test for its second bank. The regulation (13 CCR 1968.2, comprehensive components) demands detection of such short circuits on output components. Typical causes are a harness rubbed through on the cylinder head or water and oil in the connector. With a grounded control line the actuator cannot work reliably, and lift switching on bank 2 is lost.
- What you may notice
- Check engine light on
- Lift switching inactive on bank 2, less power or more fuel use
- Likely causes
- LikelyHarness to the bank 2 actuator chafed through on the cylinder head or a bracket
- PossibleOil or water in the actuator connector
- PossibleShorted winding in actuator B
- 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.