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TuningBot DTC Database · v4.37.14

P2D78 Battery Charger Control Module B Processor Performance

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainSoftwareOBD2

What P2D78 means

P2D78
Battery Charger Control Module B Processor Performance Generic · software Data confidence 65%

The control module judged the Battery Charger Control Module B Processor behaviour implausible for the current operating conditions.

Symptoms

  • MIL illuminated
  • Symptoms depend on the affected internal function

Possible causes

  • Internal control module hardware fault
  • Control module supply voltage or ground fault
  • Software/coding fault after programming
  • In rare cases, interference from wiring faults

Recommended checks

  • Check control module power supplies and grounds first
  • Check battery condition and charging voltage
  • Verify software version and check OEM bulletins
  • Clear the code and retest under the original conditions
  • Only after supply-side checks, consider module assessment

Related and nearby codes

P2D range
P2D00P2D01P2D02P2D03P2D04P2D05P2D06P2D07P2D08P2D09P2D0AP2D0BP2D0CP2D0DP2D0EP2D0FP2D10P2D11

How to read P2D78

P

Powertrain: engine, transmission and driveline systems.

2

Generic SAE-standard code: same meaning on every make.

D78

Specific fault index within the subsystem.

Frequently asked questions about P2D78

What does P2D78 mean?

Battery Charger Control Module B Processor Performance. The control module judged the Battery Charger Control Module B Processor behaviour implausible for the current operating conditions.

Is P2D78 generic or manufacturer-specific?

P2D78 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P2D78 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

Stage 1/2/3 TuningDPF RemovalEGR RemovalAdBlue / SCR RemovalDTC RemovalIMMO OFFSpeed Limiter (Vmax)

Understand the system behind this code: Diagnostic Strategy and DTC Logic

ECU tuningDyno-tested results by model and engine See the results →

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