P1266 Jeep Code - Glow Plug #4 Circuit
Quick Answer
The P1266 diagnostic trouble code (DTC) for Jeep vehicles specifically refers to an issue with the Glow Plug #4 Circuit. Common causes include Faulty glow plug, Damaged wiring harness, Defective relay. 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
- P1266 Jeep indicates Glow Plug #4 Circuit.
- Common causes
- Common causes include Faulty glow plug, Damaged wiring harness, Defective relay.
- 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 P1266 Jeep Description
The P1266 diagnostic trouble code (DTC) for Jeep vehicles specifically refers to an issue with the Glow Plug #4 Circuit. Glow plugs are components found in diesel engines that help assist with the combustion process by heating up the air in the combustion chamber, especially during cold starts or in cold weather conditions. Glow Plug #4 Circuit indicates that there is a problem with the electrical circuit associated with the fourth glow plug in the engine.
Common Causes of P1266 Jeep
- Faulty glow plug
- Damaged wiring harness
- Defective relay
- Issue with the engine control module (ECM)
- Poor electrical connection
Symptoms of P1266 Jeep
- Difficulty starting the engine, especially in cold weather
- Rough idling or shaking engine
- Decreased fuel efficiency
- Engine misfires
- Illumination of the check engine light
How to Fix P1266 Jeep
- Begin by diagnosing the exact cause of the issue using a scan tool to determine if it is the glow plug, wiring, relay, or ECM causing the problem.
- If the glow plug is faulty, it will need to be replaced. Access to the glow plug may require removing other components in the engine bay.
- Check the wiring harness for any signs of damage or corrosion. Repair or replace any damaged wires.
- Test the relay to see if it is functioning correctly. Replace it if necessary.
- If the issue lies with the ECM, it may need reprogramming or replacement, depending on the severity of the problem.
Cost to Fix P1266 Jeep
The cost of repairing the Glow Plug #4 Circuit issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, replacing a glow plug can cost between $50 and $150 per plug, not including labor. The total cost including parts and labor for this repair could range from $150 to $400 or more. It's essential to get a detailed quote from a trusted mechanic or dealership before proceeding with the repair.
Tech Notes for P1266 Jeep
Need more information about the P1266 Jeep code?
Need more information on how to fix the P1266 Jeep code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1266 Jeep code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1266 Jeep Code
No Frequently Asked Questions about P1266 Jeep Code found.
Discuss the causes and fixes for P1266 Jeep OBDII Code
Code P1266 Jeep 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.