P1402 Chevrolet 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 Chevrolet 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 Chevrolet Description
What are the Possible Causes of the DTC P1402 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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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Information for Specific Chevrolet Models
- P1402 2014 Chevrolet Silverado — Exhaust Gas Recirculation Supply Circuit
- P1402 2015 Chevrolet Silverado — Exhaust Gas Recirculation Supply Circuit
- P1402 2016 Chevrolet Silverado — Exhaust Gas Recirculation Supply Circuit
- P1402 2017 Chevrolet Silverado — Exhaust Gas Recirculation Supply Circuit
- P1402 2018 Chevrolet Silverado — Exhaust Gas Recirculation Supply Circuit
Frequently Asked Questions about P1402 Chevrolet Code
1. What are the common symptoms of OBDII code P1402 (Chevrolet) related to the Exhaust Gas Recirculation (EGR) supply circuit?
The common symptoms include rough idling, engine stalling, decreased fuel efficiency, and an illuminated Check Engine Light.
2. What are the typical causes of OBDII code P1402 (Chevrolet) indicating an issue with the EGR supply circuit?
Common causes include a faulty EGR valve, clogged EGR passages, damaged wiring or connectors in the EGR system, or a malfunctioning EGR vacuum regulator solenoid.
3. How can I diagnose the OBDII code P1402 (Chevrolet) related to the EGR supply circuit issue?
Diagnosis involves using a scan tool to retrieve the error code, inspecting the EGR valve and related components for damage or blockages, testing the EGR vacuum regulator solenoid, and checking the wiring for any faults.
4. What are some repair tips for fixing OBDII code P1402 (Chevrolet) associated with the EGR supply circuit problem?
Repair tips may include cleaning or replacing the EGR valve, clearing any clogs in the EGR passages, repairing or replacing damaged wiring or connectors, and testing or replacing the EGR vacuum regulator solenoid.
5. Can driving with OBDII code P1402 (Chevrolet) triggered by EGR supply circuit issues cause further damage to the vehicle?
Continuing to drive with this code may lead to poor engine performance, increased emissions, and potential damage to other components in the EGR system and engine, so it's advisable to address the issue promptly.
6. How important is it to address OBDII code P1402 (Chevrolet) linked to the EGR supply circuit malfunction?
Addressing this code is crucial as it can impact the vehicle's performance, fuel efficiency, and emissions compliance. Ignoring the issue may lead to more severe problems over time.
7. Are there any preventive measures to avoid encountering OBDII code P1402 (Chevrolet) due to EGR supply circuit issues?
Regular maintenance, such as cleaning the EGR system components, inspecting for any signs of wear or damage, and addressing any related warning lights promptly, can help prevent this code from appearing.
8. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1402 (Chevrolet) related to EGR supply circuit problems?
Depending on the specific issue, some DIY enthusiasts may be able to address this code by following repair guides, but more complex problems may require professional diagnosis and repair.
9. How long does it typically take to repair OBDII code P1402 (Chevrolet) associated with EGR supply circuit malfunctions?
The repair time can vary based on the exact cause of the issue, but it may take anywhere from an hour for simple fixes like cleaning components to several hours for more involved repairs or part replacements.
10. Is it recommended to reset the Check Engine Light after repairing OBDII code P1402 (Chevrolet) linked to EGR supply circuit problems?
Yes, it is advisable to clear the error code and reset the Check Engine Light after addressing the issue to ensure the repair was successful and to monitor if the code reappears.
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