OBD Guide
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P16F3

Control Module Redundant Memory Performance

P16F3 is an OBD-II diagnostic trouble code meaning: Control Module Redundant Memory Performance. Common causes: internal ecm malfunction, ecm power supply problems (unstable voltage). Estimated repair cost: $89–389.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$89–389 (est.)

Symptoms

  • Unstable engine operation
  • Loss of adaptations after turning off the ignition
  • Check Engine Light Illuminates
  • Resetting the on-board computer settings
  • Problems starting the engine

Causes

  • Internal ECM malfunction
  • ECM power supply problems (unstable voltage)
  • Short circuit in control circuits
  • ECM software failure
  • Damage to the wiring harness to the ECM

How to Fix

  1. Check ECM supply voltage and ground
  2. Scan the ECM for additional errors
  3. Try to reflash the control unit
  4. Replace ECM if necessary
  5. Check the integrity of the wiring harness to the ECM

Related codes

P16F0P16F1P16F2

FAQ

What does the P16F3 code mean?

P16F3 is an OBD-II diagnostic trouble code that indicates: Control Module Redundant Memory Performance

What causes a P16F3 error code?

The most common causes of P16F3 include: Internal ECM malfunction; ECM power supply problems (unstable voltage); Short circuit in control circuits; ECM software failure.

How do I fix a P16F3 diagnostic trouble code?

To fix P16F3: Check ECM supply voltage and ground. Scan the ECM for additional errors. Try to reflash the control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P16F3?

Yes, but get it checked soon

How much does it cost to fix P16F3?

The estimated repair cost for P16F3 is $89–389. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat