P0C90Hybrid/EV Battery Temperature Sensor J Circuit High
- 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
- P0C90 reports the opposite case: sensor J reads above its voltage window, which with a pull-up circuit points to an open thermistor, a broken lead or a disconnected plug, and the controller sees an impossibly cold module. In GM's 2016 and 2019 tables (16OBDG02, 19OBDG02) a converted value colder than −69 °C in 8 out of 10 readings, one every 100 ms, fails the test; it is Type B, so the lamp waits for the second bad trip, and it runs only above 10.2 V with communication intact. For sensor [09] of the 2018 Outlander PHEV, Mitsubishi records an open when more than 3.97 V, below −62 °C, persists for 2 s. Because the battery seems frozen, the system may limit power, keep the engine running or ask for warming on a plug-in. P0C8F is the short-circuit counterpart.
- What you may notice
- Battery-too-cold message although the weather is mild
- Little or no electric drive power
- Battery heater switching on without need
- Likely causes
- LikelyOpen lead or unplugged connector at sensor J
- PossibleThermistor J open internally
- RareTerminal pushed back in the monitoring board plug
- 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.