P1402 2017 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 2017 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 2017 Chevrolet Silverado Description
What are the Possible Causes of the DTC P1402 2017 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 2017 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 2017 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 2017 Chevrolet Silverado Code
1. What does the OBDII code P1402 mean on a 2017 Chevrolet Silverado?
P1402 indicates an issue with the Exhaust Gas Recirculation (EGR) supply circuit, which controls the flow of exhaust gases back into the engine for emissions reduction.
2. What are the common symptoms of code P1402 in a 2017 Chevrolet Silverado?
Symptoms may include a check engine light, rough idling, reduced fuel efficiency, engine hesitation, or increased emissions.
3. What causes the P1402 code to appear on a 2017 Chevrolet Silverado?
Common causes include a malfunctioning EGR valve, clogged EGR passages, damaged wiring or connectors, or a faulty EGR position sensor.
4. Can driving with code P1402 damage my 2017 Chevrolet Silverado?
Driving with P1402 for an extended period can lead to poor engine performance and increased emissions but is unlikely to cause immediate severe damage.
5. How can I diagnose the P1402 code on my 2017 Chevrolet Silverado?
Use an OBDII scanner to confirm the code, then inspect the EGR valve, wiring, and connectors. Check for carbon buildup in the EGR passages and verify proper operation of the EGR system.
6. How do I fix the P1402 code on a 2017 Chevrolet Silverado?
Repairs may involve cleaning or replacing the EGR valve, repairing damaged wiring, clearing carbon buildup in the system, or replacing a faulty EGR position sensor.
7. How much does it cost to fix the P1402 code on a 2017 Chevrolet Silverado?
Costs can vary widely. Cleaning the EGR valve may cost $100-$200, while replacing the valve or sensor can range from $200 to $500, including labor.
8. Can a clogged EGR valve cause the P1402 code on my 2017 Chevrolet Silverado?
Yes, a clogged EGR valve can restrict exhaust gas flow and trigger the P1402 code by disrupting the EGR supply circuit.
9. Can I clear the P1402 code without fixing the issue on my 2017 Chevrolet Silverado?
Clearing the code without addressing the underlying issue may result in the code returning and could lead to worsening performance or emissions problems.
10. Is the P1402 code related to emissions testing for my 2017 Chevrolet Silverado?
Yes, the P1402 code can cause your Silverado to fail an emissions test due to improper exhaust gas recirculation and increased pollutant output.
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