OBD Guide
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P15AB

Engine Mounting Control Module Power Supply Circuit Low Voltage

P15AB is an OBD-II diagnostic trouble code meaning: Engine Mounting Control Module Power Supply Circuit Low Voltage. Common causes: problems with module wiring or connectors, faulty relay or fuse. Estimated repair cost: $56–167.

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

Symptoms

  • Increased engine vibrations
  • Rattling sound from the engine compartment
  • Unstable engine operation at idle
  • Check Engine Light Illuminates
  • Reduced driving comfort

Causes

  • Problems with module wiring or connectors
  • Faulty relay or fuse
  • Wiring harness damage
  • Malfunction of the engine mounting module itself
  • Alternator or battery problems

How to Fix

  1. Check the condition of fuses and relays
  2. Inspect module connectors and wiring
  3. Check the voltage at the module terminals
  4. Test the operation of the engine mounting module
  5. Replace the module if necessary

Related codes

P15A9P15ACP15AD

FAQ

What does the P15AB code mean?

P15AB is an OBD-II diagnostic trouble code that indicates: Engine Mounting Control Module Power Supply Circuit Low Voltage

What causes a P15AB error code?

The most common causes of P15AB include: Problems with module wiring or connectors; Faulty relay or fuse; Wiring harness damage; Malfunction of the engine mounting module itself.

How do I fix a P15AB diagnostic trouble code?

To fix P15AB: Check the condition of fuses and relays. Inspect module connectors and wiring. Check the voltage at the module terminals. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P15AB?

Yes, but get it checked soon

How much does it cost to fix P15AB?

The estimated repair cost for P15AB is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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