P2D41 code meaning
A/C Compressor Motor Voltage B Performance
Powertrain system Generic code P2Dxx codes Check engine light
What P2D41 means
P2D41 is a plausibility check on the second voltage value that an electric A/C compressor reports for its motor drive: the reading is electrically valid but disagrees with a reference, for example the traction battery voltage or the first compressor voltage value. Which voltage the letter B stands for is up to the manufacturer; no manufacturer documents P2D41 on an official public source. GM shows the principle for voltage A in the Volt: P0D69 compares compressor input voltage with the pack voltage and fails above a 15 V gap (2011) or 30 V (2016), Type B. California only demands such monitoring where the compressor serves battery cooling or engine control. Low and high signal: P2D42, P2D43.
P2D41 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2D41
- Hybrid or EV warning message, warning lamp depending on the manufacturer
- A/C cooling reduced or switched off
Common causes of P2D41
- Most likelyFaulty voltage measurement inside the compressor control module
- PossibleContact resistance at the high-voltage connector of the compressor
- Less likelyImplausible reference value from the battery or hybrid control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ac compressor motorAc compressor moduleWiring harness
What each part of P2D41 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 41 | The exact fault in that area. |
What to do next
- Note P2D41 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 P2D41
What does P2D41 mean?
P2D41 means "A/C Compressor Motor Voltage B Performance". P2D41 is a plausibility check on the second voltage value that an electric A/C compressor reports for its motor drive: the reading is electrically valid but disagrees with a reference, for example the traction battery voltage or the first compressor voltage value. It is a generic code, so it means the same on every make.
Is it safe to drive with P2D41?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2D41 fail an emissions test?
P2D41 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2D41 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P2D41 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.