P1402 2018 Chevrolet Silverado Code - Exhaust Gas Recirculation Supply Circuit
Quick Answer
The P1402 code on a 2018 Chevrolet Silverado indicates a problem with the Exhaust Gas Recirculation (EGR) system's supply circuit. Common causes include Faulty EGR valve, Clogged EGR passages, Wiring or electrical issues in the EGR supply circuit. 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 EGR valve, Clogged EGR passages, Wiring or electrical issues in the EGR supply circuit.
- 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 2018 Chevrolet Silverado Description
The P1402 code on a 2018 Chevrolet Silverado indicates a problem with 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 system. The EGR supply circuit ensures that the correct amount of exhaust gas is delivered to the EGR valve for proper operation.
Common Causes of P1402 2018 Chevrolet Silverado
- Faulty EGR valve
- Clogged EGR passages
- Wiring or electrical issues in the EGR supply circuit
- Vacuum leaks in the EGR system
- Carbon buildup in the EGR system
Symptoms of P1402 2018 Chevrolet Silverado
- Check Engine Light illuminated on the dashboard
- Reduced fuel efficiency
- Rough idling or stalling
- Increased emissions
- Engine misfires
How to Fix P1402 2018 Chevrolet Silverado
- Diagnose the EGR system: Use a scan tool to retrieve the trouble codes and perform a visual inspection of the EGR valve, passages, and wiring.
- Test the EGR valve: Check the EGR valve for proper operation by applying vacuum and ensuring that it opens and closes smoothly.
- Clean or replace the EGR valve: If the EGR valve is faulty, clean it to remove any carbon buildup or replace it with a new one.
- Inspect and clean EGR passages: Check for clogs or restrictions in the EGR passages and clean them as needed to ensure proper flow.
- Repair wiring or vacuum leaks: Inspect the wiring and vacuum lines in the EGR supply circuit for damage or leaks and repair or replace as necessary.
Cost to Fix P1402 2018 Chevrolet Silverado
The typical repair costs for addressing a P1402 code on a 2018 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.
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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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