P1402 Infiniti Code - EGR Function Open
Quick Answer
The P1402 Infiniti diagnostic trouble code indicates that there is an issue with the Exhaust Gas Recirculation (EGR) valve function being open. Common causes include Faulty EGR valve, Clogged EGR passages, Vacuum leaks in the EGR system. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P1402 Infiniti indicates EGR Function Open.
- Common causes
- Common causes include Faulty EGR valve, Clogged EGR passages, Vacuum leaks in the EGR system.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code P1402 Infiniti Description
The P1402 Infiniti diagnostic trouble code indicates that there is an issue with the Exhaust Gas Recirculation (EGR) valve function being open. The EGR valve is responsible for recirculating a portion of the exhaust gases back into the engine's intake manifold to reduce emissions and control combustion temperatures. When the EGR valve is stuck open, it can lead to a variety of problems, including reduced engine performance, increased emissions, and potential damage to other engine components.
Common Causes of P1402 Infiniti
- Faulty EGR valve
- Clogged EGR passages
- Vacuum leaks in the EGR system
- Electrical issues with the EGR valve solenoid
- Carbon buildup in the EGR valve or passages
Symptoms of P1402 Infiniti
- Check Engine Light illuminated on the dashboard
- Rough idle or stalling
- Decreased fuel efficiency
- Engine knocking or pinging
- Increased emissions output
How to Fix P1402 Infiniti
- Begin by diagnosing the specific cause of the issue using a scan tool to confirm the P1402 code and inspecting the EGR valve and related components.
- Clean or replace the EGR valve if it is found to be faulty or stuck open.
- Clear any carbon buildup in the EGR passages and ensure they are free of debris.
- Check for and repair any vacuum leaks in the EGR system.
- Reset the Check Engine Light and test drive the vehicle to confirm the repair.
Cost to Fix P1402 Infiniti
The cost of repairing a P1402 Infiniti code can vary depending on the specific cause of the issue. On average, the cost of replacing a faulty EGR valve can range from $150 to $400, including parts and labor. Additional costs may be incurred for cleaning or clearing out carbon buildup, as well as diagnosing any other related issues. It's important to note that labor rates and diagnostic fees can vary, so it's recommended to obtain quotes from local auto repair shops to get a more accurate estimate.
Tech Notes for P1402 Infiniti
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