P1402 2014 GMC Sierra Code - Exhaust Gas Recirculation Supply Circuit
Quick Answer
The P1402 diagnostic trouble code (DTC) in a 2014 GMC Sierra relates to the Exhaust Gas Recirculation (EGR) system's supply circuit. Common causes include Faulty EGR valve, Clogged EGR passages, Wiring issues or electrical connection problems. 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
- P1402 2014 GMC Sierra indicates Exhaust Gas Recirculation Supply Circuit.
- Common causes
- Common causes include Faulty EGR valve, Clogged EGR passages, Wiring issues or electrical connection problems.
- 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.
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Code P1402 2014 GMC Sierra Description
The P1402 diagnostic trouble code (DTC) in a 2014 GMC Sierra relates to the Exhaust Gas Recirculation (EGR) system's supply circuit. The EGR system is responsible for reducing nitrogen oxide emissions by recirculating a portion of the exhaust gases back into the engine's intake manifold. The EGR valve controls this process, allowing a precise amount of exhaust gas to enter the combustion chamber to lower peak combustion temperatures and reduce harmful emissions.
Common Causes of P1402 2014 GMC Sierra
- Faulty EGR valve
- Clogged EGR passages
- Wiring issues or electrical connection problems
- Malfunctioning EGR solenoid
- Carbon buildup in the EGR system
Symptoms of P1402 2014 GMC Sierra
- Check Engine Light illuminated
- Rough idling or stalling
- Decreased fuel efficiency
- Engine hesitation or misfires
- Failed emissions test
How to Fix P1402 2014 GMC Sierra
- Diagnose the issue using a scan tool to confirm the P1402 code and pinpoint the exact cause of the problem.
- Inspect the EGR valve, passages, and solenoid for any signs of damage, clogs, or electrical issues.
- Clean or replace the EGR valve and passages if clogged with carbon deposits.
- Test the EGR solenoid for proper operation and replace if necessary.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1402 2014 GMC Sierra
The cost of repairing a P1402 code in a 2014 GMC Sierra can vary depending on the exact cause of the issue and the labor rates in your area. Generally, replacing an EGR valve can cost between $150 and $300, while cleaning the EGR system may cost around $100 to $200. Labor costs can range from $80 to $150 per hour, and the total repair bill may amount to $300 to $600 or more. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your specific situation.
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