P1402 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC P1402 2018 Chevrolet Silverado?
- 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 2018 Chevrolet Silverado?
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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Code
1. What does OBDII code P1402 mean on a 2018 Chevrolet Silverado?
Code P1402 indicates an issue with the Exhaust Gas Recirculation (EGR) supply circuit, which controls the flow of exhaust gases back into the intake manifold to reduce emissions.
2. What are the common symptoms of code P1402 on a 2018 Chevrolet Silverado?
Symptoms may include the Check Engine Light turning on, reduced engine performance, rough idling, increased fuel consumption, and possible engine knocking.
3. What causes the P1402 code to appear on a 2018 Chevy Silverado?
Common causes include a malfunctioning EGR valve, clogged EGR passages, faulty EGR position sensor, damaged wiring or connectors in the EGR circuit, or a problem with the engine control module (ECM).
4. Can a clogged EGR valve trigger the P1402 code?
Yes, a clogged or stuck EGR valve can restrict exhaust gas flow, causing the code to trigger.
5. How can I diagnose the P1402 code on my 2018 Silverado?
Use an OBDII scanner to confirm the code, inspect the EGR valve and related wiring for damage, and check for clogs in the EGR passages or carbon buildup.
6. Is it safe to drive with the P1402 code on my 2018 Chevrolet Silverado?
Driving with the P1402 code is not recommended as it may lead to decreased engine performance, increased emissions, and potential long-term damage to the engine.
7. How do I fix the P1402 code on a 2018 Chevy Silverado?
Repairs may include cleaning or replacing the EGR valve, repairing damaged wiring or connectors, clearing blockages in EGR passages, or reprogramming the ECM if necessary.
8. How much does it cost to repair code P1402 on a 2018 Chevrolet Silverado?
Repair costs vary depending on the issue, but cleaning the EGR valve may cost $100-$200, while replacing the valve can range from $300-$600.
9. Can a faulty EGR position sensor cause the P1402 code?
Yes, a malfunctioning EGR position sensor can cause incorrect readings, leading to the P1402 code being triggered.
10. How do I prevent the P1402 code from recurring on my Silverado?
Regular maintenance, such as cleaning the EGR system and ensuring good-quality fuel, can help prevent carbon buildup and keep the EGR system functioning properly.
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