OBD Guide
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P164C

Internal Control Module Start-Stop Performance

P164C is an OBD-II diagnostic trouble code meaning: Internal Control Module Start-Stop Performance. Common causes: malfunction of the start-stop system control module, problems with the module software. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Start-stop system does not work
  • Check Engine light comes on
  • Problems starting the engine
  • Decreased fuel efficiency
  • Irregular engine idling

Causes

  • Malfunction of the start-stop system control module
  • Problems with the module software
  • Damage to the wiring to the module
  • Low battery voltage
  • Problems with system-related sensors

How to Fix

  1. Check battery condition and voltage
  2. Diagnose the control module for errors
  3. Check the integrity of wiring and connections
  4. Update module software
  5. If necessary, replace the control module

Related codes

P164DP164B

FAQ

What does the P164C code mean?

P164C is an OBD-II diagnostic trouble code that indicates: Internal Control Module Start-Stop Performance

What causes a P164C error code?

The most common causes of P164C include: Malfunction of the start-stop system control module; Problems with the module software; Damage to the wiring to the module; Low battery voltage.

How do I fix a P164C diagnostic trouble code?

To fix P164C: Check battery condition and voltage. Diagnose the control module for errors. Check the integrity of wiring and connections. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P164C?

Yes, but get it checked soon

How much does it cost to fix P164C?

The estimated repair cost for P164C is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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