P2BEAHybrid/EV Battery Precharge Contactor Control Circuit B Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2BEA is stored when control circuit B of the precharge function carries less voltage than its state requires, mostly because the coil feed touches ground or the output is pulled down. With a high-side driver the coil then gets no current and the second precharge path stays open. No manufacturer documents P2BEA publicly. GM's 2016 test of the contactor A equivalent (P0AE6) checks the driver output while it is commanded on and fails below 5.35 V, 13 of 16 samples at 12.5 ms, Type B, two trips, with the 12 V supply above 10.2 V. GM also notes that its open test cannot see a short to ground, which is why this case has its own code. CARB requires circuit checks on hybrid outputs. The high side is P2BEB.
- What you may notice
- Vehicle does not become ready to drive
- MIL and hybrid or EV warning on
- Likely causes
- LikelyCoil feed chafed and shorted to ground
- PossibleCoil of precharge contactor B shorted internally
- RareDriver stage of the battery controller pulled low
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.