P2C8D code meaning
DC/DC Converter Temperature Sensor D Circuit Range/Performance
Powertrain system Generic code P2Cxx codes Check engine light
What P2C8D means
P2C8D is the plausibility test of DC/DC converter temperature sensor D: the voltage is electrically valid, but the temperature it implies does not match what the controller expects. Typical cross-checks compare the sensor with its neighbours after a long rest or look for a value that hardly changes while the converter works hard. FCA applies the code to its eTorque Ram 1500 pickup of model year 2021 (3.6 L V6), next to P0C39, P0C3E and P0E59 for the other converter sensors. Bulletin 08-037-21 flashes new Hybrid Control Processor software for trucks built up to 5 January 2021, and with it P2C8D becomes a one-trip fault, so the MIL lights after the first failed drive. FCA does not publish its limits. CARB demands rationality checks for hybrid component temperature sensors.
P2C8D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.3 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2C8D
- MIL on, with newer FCA software after one faulty drive
- Reduced eTorque assist or start-stop availability
Common causes of P2C8D
- PossibleHybrid control software level (FCA HCP update per 08-037-21)
- PossibleSensor D drifting and disagreeing with the other converter sensors
- Less likelyUneven cooling of the converter, e.g. low coolant or air in the circuit
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Dcdc converter temp sensor dWiring harnessDcdc converter
What each part of P2C8D means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| C | Area: hybrid propulsion. |
| 8D | The exact fault in that area. |
What to do next
- Note P2C8D 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 P2C8D
What does P2C8D mean?
P2C8D means "DC/DC Converter Temperature Sensor D Circuit Range/Performance". P2C8D is the plausibility test of DC/DC converter temperature sensor D: the voltage is electrically valid, but the temperature it implies does not match what the controller expects. It is a generic code, so it means the same on every make.
Is it safe to drive with P2C8D?
Drive gently and only to a workshop. With P2C8D the car can go into limp mode (reduced power) to protect itself.
Will P2C8D fail an emissions test?
Yes, it can. P2C8D 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 P2C8D to fix?
Difficulty: workshop only. A typical repair takes 0.3 to 5 hours of work. This is a job for a workshop.
Will P2C8D 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.