P0CAEHybrid/EV Battery Temperature Sensor N Circuit Range/Performance
- 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
- P0CAE is the plausibility check for sensor N: the value is electrically acceptable, yet out of line with its neighbours. GM's 2012 Volt table 12OBDG01A demands a rest of more than 21,600 s without propulsion, external charging or thermal conditioning and then fails the test at a deviation above 25.3 °C in 50 of 67 samples, Type B. The 2019 table 19OBDG02 keeps the count but uses 25.00 °C, 25 ms sampling and a minimum supply of 10.2 V. Mitsubishi's 2022 Outlander PHEV applies the code to module sensor [13] and checks it once per drive cycle after a one-hour soak: 13 °C or more away from the 50-sensor mean for 0.32 s. Electrical faults of N are reported separately as P0CAF and P0CB0.
- What you may notice
- Warning lamp after the car has stood for hours
- Limited battery power
- Likely causes
- LikelyThermistor N reading off while electrically valid
- PossibleSensor N detached from its cell or module surface
- RareReal temperature difference in that pack section
- 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: €80 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.