Engine-CodesGMC – P0606 2017 GMC Sierra

P0606 2017 GMC Sierra Code - Control Module Processor Performance

Quick Answer

The P0606 diagnostic trouble code (DTC) in a 2017 GMC Sierra indicates an issue with the Control Module Processor Performance. Common causes include Faulty ECM/PCM, Wiring harness issues, Software malfunction. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0606 2017 GMC Sierra indicates Control Module Processor Performance.
Common causes
Common causes include Faulty ECM/PCM, Wiring harness issues, Software malfunction.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Aug 18, 2024
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Code P0606 2017 GMC Sierra Description

The P0606 diagnostic trouble code (DTC) in a 2017 GMC Sierra indicates an issue with the Control Module Processor Performance. This code typically points to a problem with the Engine Control Module (ECM) or Powertrain Control Module (PCM) in the vehicle. The ECM/PCM is essentially the brain of the vehicle, responsible for controlling various functions such as fuel injection, ignition timing, and emissions systems. When the processor performance is compromised, it can lead to erratic behavior and poor performance of the vehicle.

OBDII Code P0606 2017 GMC Sierra - Control Module Processor Performance
P0606 2017 GMC Sierra Code - Control Module Processor Performance

Common Causes of P0606 2017 GMC Sierra

  1. Faulty ECM/PCM
  2. Wiring harness issues
  3. Software malfunction
  4. Faulty control modules
  5. Electrical interference or shorts

Symptoms of P0606 2017 GMC Sierra

  1. Check Engine Light illuminated on the dashboard
  2. Loss of power or acceleration
  3. Engine stalling or rough idle
  4. Poor fuel efficiency
  5. Difficulty starting the vehicle

How to Fix P0606 2017 GMC Sierra

  1. Diagnose the issue using a professional OBD-II scanner to pinpoint the exact cause of the code.
  2. Inspect and test the ECM/PCM for any faults or damage.
  3. Check the wiring harness for any signs of wear, corrosion, or loose connections.
  4. Update or reflash the ECM/PCM software to address any software glitches.
  5. Replace the ECM/PCM if it is determined to be the root cause of the problem.

Cost to Fix P0606 2017 GMC Sierra

The cost of repairing a P0606 code in a 2017 GMC Sierra can vary depending on the exact cause of the issue. On average, the repair cost can range from $200 to $800, including parts and labor. Keep in mind that labor rates and diagnostic fees can vary based on the location and the specific repair shop. It's recommended to get quotes from multiple mechanics to ensure a competitive price for the repair.

Tech Notes for P0606 2017 GMC Sierra

Check the Powertrain Control Module (PCM) fuse, if the fuse is OK, then try erasing the code first and if the code comes back you may have to reprogram or replace the PCM.

There is a Factory Service Bulletin for the following Chevrolet models:
2010 Chevrolet Express
2011 Chevrolet Express
2011 Chevrolet Silverado
Chevrolet Factory Service Bulletin OBDII Code P0606

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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