OBD Guide
ENFRDEESPT

P3100

High voltage powertrain control module failure

P3100 is an OBD-II diagnostic trouble code meaning: High voltage powertrain control module failure. Common causes: hpcm internal fault, module power problems. Estimated repair cost: $167–889.

Severity
🚨 Critical
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–889 (est.)

Symptoms

  • Check Engine Light Is On
  • Power Loss
  • The car goes into emergency mode
  • Inability to start the engine
  • Reduced performance of the hybrid system

Causes

  • HPCM internal fault
  • Module power problems
  • Damage to high voltage wiring
  • Short circuit in the circuit
  • Module software error

How to Fix

  1. Check power supply and grounding of the module
  2. Inspect high-voltage wiring for damage
  3. Check error codes in other modules
  4. Flash or replace HPCM
  5. Repair only from an authorized dealer

Related codes

P3101P3102P3103

Error P3100 by Vehicle Brand

Audi

FAQ

What does the P3100 code mean?

P3100 is an OBD-II diagnostic trouble code that indicates: High voltage powertrain control module failure

What causes a P3100 error code?

The most common causes of P3100 include: HPCM internal fault; Module power problems; Damage to high voltage wiring; Short circuit in the circuit.

How do I fix a P3100 diagnostic trouble code?

To fix P3100: Check power supply and grounding of the module. Inspect high-voltage wiring for damage. Check error codes in other modules. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3100?

Do not drive — repair immediately

How much does it cost to fix P3100?

The estimated repair cost for P3100 is $167–889. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat