OBD Guide
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P16F9

Control Module Shutdown Performance

P16F9 is an OBD-II diagnostic trouble code meaning: Control Module Shutdown Performance. Common causes: engine control module (ecm) malfunction, ecm power or ground problems. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–556 (est.)

Symptoms

  • The engine stalls or runs erratically
  • Power Loss
  • Check Engine light comes on
  • Problems starting the engine
  • Spontaneous shutdown of electronic systems

Causes

  • Engine control module (ECM) malfunction
  • ECM power or ground problems
  • Control module overheating
  • Software errors in ECM
  • Damage to the wiring harness to the ECM

How to Fix

  1. Check connections and integrity of wiring harness to ECM
  2. Check supply voltage and quality of ECM grounding
  3. Update ECM software
  4. Check ECM for overheating
  5. Replace the engine control module if necessary

Related codes

P0606P062FP16F8

FAQ

What does the P16F9 code mean?

P16F9 is an OBD-II diagnostic trouble code that indicates: Control Module Shutdown Performance

What causes a P16F9 error code?

The most common causes of P16F9 include: Engine control module (ECM) malfunction; ECM power or ground problems; Control module overheating; Software errors in ECM.

How do I fix a P16F9 diagnostic trouble code?

To fix P16F9: Check connections and integrity of wiring harness to ECM. Check supply voltage and quality of ECM grounding. Update ECM software. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P16F9?

Do not drive — repair immediately

How much does it cost to fix P16F9?

The estimated repair cost for P16F9 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat