OBD Guide
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P16AF

Engine Controls Ignition Relay Feedback Circuit 2 Low Voltage

P16AF is an OBD-II diagnostic trouble code meaning: Engine Controls Ignition Relay Feedback Circuit 2 Low Voltage. Common causes: faulty ignition relay, damaged wiring or poor contacts. Estimated repair cost: $6–28.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–28 (est.)

Symptoms

  • Problems starting the engine
  • Stalling engine
  • Unstable engine operation
  • Check Engine Light Is On
  • Power Loss

Causes

  • Faulty ignition relay
  • Damaged wiring or poor contacts
  • Short circuit in the circuit
  • Problems with the engine control unit
  • Corrosion of relay contacts

How to Fix

  1. Check the condition of the ignition relay
  2. Inspect wiring and contacts for damage
  3. Check the voltage in the circuit
  4. Replace relay if necessary
  5. Clean contacts from corrosion

Related codes

P16AEP16B0P16B1

FAQ

What does the P16AF code mean?

P16AF is an OBD-II diagnostic trouble code that indicates: Engine Controls Ignition Relay Feedback Circuit 2 Low Voltage

What causes a P16AF error code?

The most common causes of P16AF include: Faulty ignition relay; Damaged wiring or poor contacts; Short circuit in the circuit; Problems with the engine control unit.

How do I fix a P16AF diagnostic trouble code?

To fix P16AF: Check the condition of the ignition relay. Inspect wiring and contacts for damage. Check the voltage in the circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P16AF?

Limited driving only, diagnose soon

How much does it cost to fix P16AF?

The estimated repair cost for P16AF is $6–28. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat