P0E43 code meaning
Hybrid/EV Powertrain Control Module B
Powertrain system Generic code P0Exx codes Check engine light
What P0E43 means
P0E43 is the module-B counterpart of P0A1D: it reports that a second hybrid/EV powertrain controller has detected an internal failure or can no longer be trusted. Vehicles with two such processors, for example GM's Bolt EV with a second powertrain module labelled K114B (HPCM2), are where the letter B makes sense. No manufacturer documents P0E43 publicly. The A code shows what is meant: GM's 2013 hybrid tables store P0A1D when a status message from motor control processor A reports a controller failure in 3 of 4 counts, Type B, and Ford's 2019 hybrid summary uses P0A1D when the serial link between its processors fails, checked continuously. CARB requires the MIL for computer faults that impair OBD. Reprogramming or module replacement is likely; power may be limited.
P0E43 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0E43
- MIL and hybrid or EV system warning
- Reduced propulsion power or no ready mode
Common causes of P0E43
- Most likelyInternal processor or memory fault in module B
- PossibleSoftware fault curable by reprogramming
- Less likelySupply, ground or internal bus fault at the module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hybrid powertrain cm b
What each part of P0E43 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 43 | The exact fault in that area. |
What to do next
- Note P0E43 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 P0E43
What does P0E43 mean?
P0E43 means "Hybrid/EV Powertrain Control Module B". P0E43 is the module-B counterpart of P0A1D: it reports that a second hybrid/EV powertrain controller has detected an internal failure or can no longer be trusted. It is a generic code, so it means the same on every make.
Is it safe to drive with P0E43?
Drive gently and only to a workshop. With P0E43 the car can go into limp mode (reduced power) to protect itself.
Will P0E43 fail an emissions test?
Yes, it can. P0E43 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 P0E43 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 6 hours of work. This is a job for a workshop.
Will P0E43 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.