P07C8Intermediate Shaft Speed Sensor B Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- These low/high codes are a purely electrical check of the sensor's signal voltage at the module and run even with the vehicle at rest – unlike the circuit, range, no-signal and intermittent codes, which evaluate speed while driving. Low means a short to ground, high a short to supply or, depending on the circuit, an open. Intermediate shaft sensor B is a further sensor on a countershaft or planetary element. No manufacturer document available to us uses this code; GM reports further 10-speed intermediate sensors under its own codes. The expected logic follows the other sensors (above about 4.75 V); the speed-based codes for sensor B are P2745–P2748.
- What you may notice
- Check engine light (GM after one trip)
- Limp mode, harsh shifts, no converter lock-up
- Adaption frozen
- Likely causes
- LikelySignal wire shorted to supply
- PossibleOpen circuit or broken wire inside the sensor
- PossibleCorroded connector
- RareModule input 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: €120 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.