P1402 2014 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 2014 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 2014 Chevrolet Silverado Description
What are the Possible Causes of the DTC P1402 2014 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 2014 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 2014 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 2014 Chevrolet Silverado Code
1. What does the P1402 code mean on a 2014 Chevrolet Silverado?
The P1402 code indicates an issue with the Exhaust Gas Recirculation (EGR) supply circuit, which is responsible for recirculating exhaust gases to reduce emissions.
2. What are the common symptoms of the P1402 code?
Symptoms may include the check engine light turning on, poor engine performance, decreased fuel efficiency, rough idling, or increased emissions.
3. What causes the P1402 code on a 2014 Chevrolet Silverado?
Common causes include a faulty EGR valve, clogged EGR passages, damaged wiring or connectors in the EGR circuit, or carbon buildup in the system.
4. How can I diagnose the P1402 code?
Start by visually inspecting the EGR valve, wiring, and connectors for damage or carbon buildup. Use a scan tool to monitor EGR system data and check for proper functionality.
5. Can I drive my truck with the P1402 code active?
While it may be possible to drive, it’s not recommended as the issue can lead to poor performance, increased emissions, and potential damage to other engine components.
6. How do I fix the P1402 code on my Silverado?
Repairs may include cleaning or replacing the EGR valve, clearing carbon buildup in the passages, repairing damaged wiring, or replacing faulty components in the EGR system.
7. How much does it cost to fix the P1402 code?
Repair costs vary, ranging from $150 to $400, depending on whether the EGR valve needs cleaning or replacement and labor costs in your area.
8. Can a clogged EGR passage cause the P1402 code?
Yes, clogged EGR passages are a common cause of this code, as they can restrict exhaust gas flow and trigger the fault.
9. What tools are needed to repair the P1402 code?
You may need a scan tool, multimeter, basic hand tools, and possibly EGR cleaning products or a replacement EGR valve.
10. How can I prevent the P1402 code from recurring?
Regular maintenance, such as cleaning the EGR system and using high-quality fuel to minimize carbon buildup, can help prevent this issue.
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