OBD Guide
ENFRDEESPT

C1657

Hybrid Powertrain Control Module

C1657 is an OBD-II diagnostic trouble code meaning: Hybrid Powertrain Control Module. Common causes: hpcm module malfunction, wiring harness problems. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–556 (est.)

Symptoms

  • Power reduction
  • Switching to emergency mode
  • Check Engine Light Illuminates
  • Battery charging problems

Causes

  • HPCM module malfunction
  • Wiring Harness Problems
  • Bad contacts
  • Software glitches
  • Module power problems

How to Fix

  1. Check wiring harness and contacts
  2. Scan the system for other errors
  3. Update module software
  4. Check module power supply
  5. Replace HPCM if necessary

Related codes

P0A80P0A7FP1A00

FAQ

What does the C1657 code mean?

C1657 is an OBD-II diagnostic trouble code that indicates: Hybrid Powertrain Control Module

What causes a C1657 error code?

The most common causes of C1657 include: HPCM module malfunction; Wiring Harness Problems; Bad contacts; Software glitches.

How do I fix a C1657 diagnostic trouble code?

To fix C1657: Check wiring harness and contacts. Scan the system for other errors. Update module software. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1657?

Limited driving only, diagnose soon

How much does it cost to fix C1657?

The estimated repair cost for C1657 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat