P0C37 code meaning
Hybrid/EV Battery Temperature Sensor F Circuit Intermittent/Erratic
Powertrain system Generic code P0Cxx codes Check engine light
What P0C37 means
P0C37 targets a sensor F signal that jumps instead of following the slow temperature change of a heavy battery. GM documents the logic in its 2016 to 2018 hybrid tables (16OBDG02, 17OBDG02, 18OBDG02): every 100 ms the controller adds up the absolute changes of the sensor value over a window of 10 samples; a sum above 10 fails the window, and 4 failed windows out of 5 set the code as Type B, two trips, with system voltage above 10.2 V and no communication fault active. The Volt, Two-Mode and eAssist tables have no erratic code for this sensor. Unlike P0C35 and P0C36, the signal stays inside its valid range, so the cause is usually a loose terminal or a cracked wire. If several sensors jump at once, the sensing board is the likelier suspect.
P0C37 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0C37
- MIL after two trips
- Intermittent hybrid warning, often on rough roads
- Temporarily reduced power
Common causes of P0C37
- Most likelyLoose terminal or connector of sensor F not fully latched after pack work
- PossibleCracked sensor wire with intermittent contact
- Less likelyFaulty battery sensing board, often with several sensors affected
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery temp sensor fWiring harnessBms
What each part of P0C37 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| 37 | The exact fault in that area. |
What to do next
- Note P0C37 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0C37
What does P0C37 mean?
P0C37 means "Hybrid/EV Battery Temperature Sensor F Circuit Intermittent/Erratic". P0C37 targets a sensor F signal that jumps instead of following the slow temperature change of a heavy battery. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C37?
Drive gently and only to a workshop. With P0C37 the car can go into limp mode (reduced power) to protect itself.
Will P0C37 fail an emissions test?
Yes, it can. P0C37 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0C37 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0C37 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.