Engine-Codes.com
Engine-Codes – Chevrolet – P066E Chevrolet

P066E Chevrolet Code - Cylinder 3 Glow Plug Control Circuit Low Voltage

Quick Answer

The P066E diagnostic trouble code (DTC) for Chevrolet vehicles specifically refers to an issue with the cylinder 3 glow plug control circuit experiencing low voltage. Common causes include Faulty glow plug in cylinder 3, Defective glow plug control module, Wiring or connection issues in the glow plug control circuit. 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
P066E Chevrolet indicates Cylinder 3 Glow Plug Control Circuit Low Voltage.
Common causes
Common causes include Faulty glow plug in cylinder 3, Defective glow plug control module, Wiring or connection issues in the glow plug control circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 27, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P066E Chevrolet Description

The P066E diagnostic trouble code (DTC) for Chevrolet vehicles specifically refers to an issue with the cylinder 3 glow plug control circuit experiencing low voltage. Glow plugs are essential components in diesel engines that aid in starting the engine by heating the combustion chamber during cold starts. When the glow plug control circuit in cylinder 3 is not receiving sufficient voltage, it can lead to difficulties in starting the engine, reduced engine performance, and potential long-term damage if left unaddressed.

OBDII Code P066E Chevrolet - Cylinder 3 Glow Plug Control Circuit Low Voltage
P066E Chevrolet Code - Cylinder 3 Glow Plug Control Circuit Low Voltage

Common Causes of P066E Chevrolet

  1. Faulty glow plug in cylinder 3.
  2. Defective glow plug control module.
  3. Wiring or connection issues in the glow plug control circuit.
  4. Corrosion or damage to electrical components in the circuit.
  5. Malfunctioning engine control module (ECM).

Symptoms of P066E Chevrolet

  1. Difficulty starting the engine, especially in cold weather.
  2. Rough idling or engine misfires.
  3. Decreased fuel efficiency.
  4. Illumination of the Check Engine Light.
  5. Increased emissions during vehicle operation.

How to Fix P066E Chevrolet

  1. Begin by diagnosing the specific cause of the low voltage issue, such as testing the glow plug, control module, and related wiring for faults.
  2. Replace the faulty glow plug in cylinder 3 if it is found to be defective.
  3. Inspect and repair any damaged wiring or connections in the glow plug control circuit.
  4. Replace the glow plug control module if it is determined to be malfunctioning.
  5. Clear the DTC from the vehicle's ECM and perform a test drive to ensure that the issue has been resolved.

Cost to Fix P066E Chevrolet

The typical repair costs for addressing a P066E code in a Chevrolet vehicle can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost of replacing a single glow plug can range from $50 to $150, while a glow plug control module can cost between $100 and $300. Labor costs for diagnosing and repairing the issue can add an additional $100 to $300 to the total repair bill. It is important to note that labor rates at auto repair shops can vary, so it is advisable to check with local shops for more accurate pricing information.

Need more information about the P066E Chevrolet code?

Need more information on how to fix the P066E Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P066E Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

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.

Frequently Asked Questions about P066E Chevrolet Code

No Frequently Asked Questions about P066E Chevrolet Code found.

Discuss the causes and fixes for P066E Chevrolet OBDII Code

Submit a New Comment

Code P066E Chevrolet comments

No comments found for this page.