OBD Guide
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P1A4F

Drive Motor 1 Control Module Not Programmed

P1A4F is an OBD-II diagnostic trouble code meaning: Drive Motor 1 Control Module Not Programmed. Common causes: engine control module not programmed, module software failure. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–222 (est.)

Symptoms

  • Check Engine light comes on
  • Problems starting the engine
  • Reduced engine power
  • Unstable engine operation
  • The car goes into emergency mode

Causes

  • Engine control module not programmed
  • Module software failure
  • Problems with communication between modules
  • Engine control module malfunction
  • Incorrect software update

How to Fix

  1. Check the status of the engine control module
  2. Run software diagnostics
  3. Reprogram the engine control module
  4. If necessary, replace the control module
  5. Check connections and wiring harness

Related codes

P1A4EP1A50P1A51

FAQ

What does the P1A4F code mean?

P1A4F is an OBD-II diagnostic trouble code that indicates: Drive Motor 1 Control Module Not Programmed

What causes a P1A4F error code?

The most common causes of P1A4F include: Engine control module not programmed; Module software failure; Problems with communication between modules; Engine control module malfunction.

How do I fix a P1A4F diagnostic trouble code?

To fix P1A4F: Check the status of the engine control module. Run software diagnostics. Reprogram the engine control module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1A4F?

Do not drive — repair immediately

How much does it cost to fix P1A4F?

The estimated repair cost for P1A4F is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat