P1402 2015 GMC Sierra Code - Exhaust Gas Recirculation Supply Circuit
Quick Answer
The Engine Control Module (ECM) supplies the Exhaust Gas Recirculation (EGR) valve with a 5 V reference circuit, a low reference circuit, an H-bridge motor directional control circuit, and a signal circuit. Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve circuit poor electrical connection. 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 2015 GMC Sierra indicates Exhaust Gas Recirculation Supply Circuit.
- Common causes
- Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve circuit poor electrical connection.
- 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.
Code P1402 2015 GMC Sierra Description
What are the Possible Causes of the DTC P1402 2015 GMC Sierra?
- Faulty Exhaust Gas Recirculation (EGR) Valve
- Exhaust Gas Recirculation Valve harness is open or shorted
- Exhaust Gas Recirculation Valve circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1402 2015 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1402 2015 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1402 2015 GMC Sierra Code
What does the OBDII code P1402 mean for a 2015 GMC Sierra?
P1402 indicates a problem with the Exhaust Gas Recirculation (EGR) supply circuit, which may affect the vehicle's emissions and performance.
What are the common symptoms of the P1402 code?
Common symptoms include reduced engine performance, increased fuel consumption, rough idling, and the illumination of the check engine light.
What could cause the P1402 code to trigger?
Possible causes include a faulty EGR valve, damaged wiring or connectors in the EGR circuit, a clogged EGR passage, or a malfunctioning engine control module (ECM).
How can I diagnose the P1402 code?
To diagnose the P1402 code, check for other related codes, inspect the EGR valve and its connections for damage, test the EGR valve operation, and examine the wiring for continuity and shorts.
What are some repair tips for fixing the P1402 code?
Repair tips include cleaning or replacing the EGR valve, repairing any damaged wiring or connectors, clearing any carbon buildup in the EGR passages, and ensuring the ECM is functioning properly.
Can I drive my GMC Sierra with the P1402 code?
While it may be possible to drive the vehicle, it is not recommended as it could lead to performance issues and increased emissions until the problem is resolved.
Is the P1402 code serious?
Yes, the P1402 code can indicate an issue that may affect engine performance and emissions, so it should be addressed promptly to avoid further complications.
Will clearing the code P1402 fix the problem?
Clearing the code will not fix the underlying issue; it may temporarily turn off the check engine light, but the code will likely reappear if the root cause is not addressed.
What is the estimated cost to repair the P1402 code?
Repair costs can vary widely, but they may range from $100 to $600, depending on whether the EGR valve needs cleaning, replacement, or if there are wiring issues to fix.
Can I prevent the P1402 code from occurring?
Regular maintenance, including cleaning the EGR system and ensuring that the engine is running efficiently, can help prevent issues related to the P1402 code from occurring.
Discuss the causes and fixes for P1402 2015 GMC Sierra OBDII Code
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