OBD Guide
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P16B6

Engine Control Module Self-Test ETC Monitoring

P16B6 is an OBD-II diagnostic trouble code meaning: Engine Control Module Self-Test ETC Monitoring. Common causes: engine control module (ecu) malfunction, problems with ecu software. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–556 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Unstable engine operation at idle
  • Acceleration problems
  • Activating emergency engine operation

Causes

  • Engine control module (ECU) malfunction
  • Problems with ECU software
  • Short circuit in throttle control circuit
  • Broken wires in the ETC system harness
  • Corrosion of contacts in ECU connectors

How to Fix

  1. Check ECU memory error codes
  2. Inspect the ETC wiring harness and connectors
  3. Check the power supply and ground of the ECU
  4. Reflash the ECU (if an update is available)
  5. Replacing the engine control module if necessary

Related codes

P16B5P16B7P2101

FAQ

What does the P16B6 code mean?

P16B6 is an OBD-II diagnostic trouble code that indicates: Engine Control Module Self-Test ETC Monitoring

What causes a P16B6 error code?

The most common causes of P16B6 include: Engine control module (ECU) malfunction; Problems with ECU software; Short circuit in throttle control circuit; Broken wires in the ETC system harness.

How do I fix a P16B6 diagnostic trouble code?

To fix P16B6: Check ECU memory error codes. Inspect the ETC wiring harness and connectors. Check the power supply and ground of the ECU. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P16B6?

Limited driving only, diagnose soon

How much does it cost to fix P16B6?

The estimated repair cost for P16B6 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat