P0C8DHybrid/EV Battery Temperature Sensor J Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0C8D covers electrical trouble in the circuit of battery temperature sensor J that the controller cannot pin down to a low, high or jumping signal. There is no public manufacturer documentation for P0C8D. GM's 2011 hybrid table counts J as temperature sensor 10 in a list of sixteen, yet like its later tables it only defines the narrower J codes P0C8E to P0C91; Mitsubishi's Outlander PHEV assigns J to module sensor [09] and likewise uses only rationality, short and open codes. Under CARB rule (e)(15.3.1) every such input must be watched all the time for plausible values and an unbroken circuit. Without a valid J reading the battery management protects that cell group by cutting charge and discharge power.
- What you may notice
- Hybrid system warning, on many models also the check-engine lamp
- Less electric power and slower charging
- Likely causes
- LikelyCorroded or loose plug between sensor J and the monitoring board
- PossibleThermistor J electrically defective
- RareFaulty input channel on the cell monitoring board
- 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: €150 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.