P066D 2014 Chevrolet Silverado Code - Cylinder 2 Glow Plug Control Circuit High Voltage
Quick Answer
The P066D diagnostic trouble code (DTC) specifically pertains to the Cylinder 2 Glow Plug Control Circuit High Voltage in a 2014 Chevrolet Silverado. Common causes include Faulty glow plug in cylinder 2, Wiring issues in the glow plug control circuit, Malfunctioning glow plug control module. 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
- P066D 2014 Chevrolet Silverado indicates Cylinder 2 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 2, Wiring issues in the glow plug control circuit, Malfunctioning glow plug control module.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P066D 2014 Chevrolet Silverado Description
The P066D diagnostic trouble code (DTC) specifically pertains to the Cylinder 2 Glow Plug Control Circuit High Voltage in a 2014 Chevrolet Silverado. This code indicates a problem with the glow plug control circuit in cylinder 2 of the engine. Glow plugs are crucial components in diesel engines, as they help ignite the fuel-air mixture in cold conditions to aid in starting the engine. When the control circuit for the glow plug in cylinder 2 experiences high voltage, it can lead to issues with starting the engine, reduced performance, and even potential damage to other engine components if left unaddressed.
Common Causes of P066D 2014 Chevrolet Silverado
- Faulty glow plug in cylinder 2
- Wiring issues in the glow plug control circuit
- Malfunctioning glow plug control module
- Problems with the engine's computer system
- Corrosion or damage to the connectors in the glow plug circuit
Symptoms of P066D 2014 Chevrolet Silverado
- Difficulty starting the engine, especially in cold weather
- Rough idling or misfires
- Reduced engine performance and power
- Increased fuel consumption
- Illumination of the check engine light on the dashboard
How to Fix P066D 2014 Chevrolet Silverado
- Diagnose the issue by using a diagnostic scanner to retrieve the trouble code and pinpoint the exact cause of the problem.
- Inspect the glow plug in cylinder 2 to determine if it is faulty and needs replacement.
- Check the wiring and connectors in the glow plug control circuit for any damage or corrosion, repairing or replacing as necessary.
- Test the glow plug control module to confirm if it is functioning correctly, replacing it if found faulty.
- Clear the trouble code from the vehicle's computer system and test the engine to ensure that the issue has been resolved.
Cost to Fix P066D 2014 Chevrolet Silverado
The cost of repairing the Cylinder 2 Glow Plug Control Circuit High Voltage issue in a 2014 Chevrolet Silverado can vary depending on the specific cause of the problem and the labor rates at the auto repair shop. Generally, replacing a faulty glow plug can cost between $50 to $150, while addressing wiring or control module issues may range from $100 to $300. Overall, the total repair cost for this issue could amount to $200 to $500, including parts and labor.
Need more information about the P066D 2014 Chevrolet Silverado code?
Need more information on how to fix the P066D 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P066D 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P066D 2014 Chevrolet Silverado Code
What does the OBDII code P066D mean for a 2014 Chevrolet Silverado?
P066D indicates a problem in the cylinder 2 glow plug control circuit, specifically high voltage detected by the engine control module (ECM).
What are the common symptoms of the P066D code in a 2014 Chevrolet Silverado?
Symptoms may include difficulty starting the engine, reduced engine performance, an illuminated check engine light, and rough idling in cold weather.
What causes the P066D code to appear in a 2014 Chevrolet Silverado?
Common causes include a faulty glow plug, damaged wiring or connectors, a malfunctioning glow plug control module, or an ECM issue.
Can I drive my 2014 Chevrolet Silverado with the P066D code?
While the truck may still be drivable, it’s not recommended to ignore the code as it can lead to starting issues, especially in cold weather.
How do I diagnose the P066D code on a 2014 Chevrolet Silverado?
Start by inspecting the glow plug, wiring, and connectors for cylinder 2. Use a multimeter to test circuit voltage and check the glow plug control module for faults.
What tools are needed to diagnose the P066D code?
You’ll need a diagnostic scanner, a multimeter for electrical testing, and possibly a wiring diagram for the glow plug circuit.
Is replacing the glow plug the only solution for the P066D code?
No, replacing the glow plug is one potential fix, but you may also need to repair or replace wiring, connectors, or the glow plug control module.
How much does it cost to repair the P066D code on a 2014 Chevrolet Silverado?
The cost varies depending on the issue. Replacing a glow plug may cost $50–$100, while repairing wiring or replacing the control module could be more expensive.
What happens if the P066D code is not fixed?
If left unresolved, the vehicle may experience starting difficulties, especially in cold weather, and prolonged electrical issues may damage other components.
Can a software update fix the P066D code?
In rare cases, a software update for the ECM may resolve the issue, but this typically applies if the problem is related to incorrect voltage readings rather than hardware faults.
Discuss the causes and fixes for P066D 2014 Chevrolet Silverado OBDII Code
Code P066D 2014 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.