P1402 Cadillac 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 Cadillac 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 Cadillac Description
What are the Possible Causes of the DTC P1402 Cadillac?
- 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 Cadillac?
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 Cadillac 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 Cadillac Code
1. What are common symptoms of OBDII code P1402 in a Cadillac related to the Exhaust Gas Recirculation (EGR) supply circuit?
Common symptoms include rough idling, engine hesitation, decreased fuel efficiency, and in some cases, the Check Engine light may illuminate.
2. What are the typical causes of OBDII code P1402 in a Cadillac?
Possible causes of this code include a faulty EGR valve, damaged EGR solenoid, clogged EGR passages, wiring issues, or a malfunctioning EGR position sensor.
3. How can I diagnose the Exhaust Gas Recirculation supply circuit issue triggering OBDII code P1402 in my Cadillac?
Diagnosis typically involves checking the EGR valve and solenoid for proper operation, inspecting the wiring for any damage, testing the EGR position sensor, and ensuring that the EGR passages are not clogged.
4. Are there any quick repair tips for addressing OBDII code P1402 in a Cadillac?
Quick repair tips may include cleaning the EGR valve and passages, checking and replacing any damaged wiring, and ensuring all EGR components are functioning correctly.
5. Can driving with an active OBDII code P1402 in a Cadillac cause further damage to the vehicle?
Continued driving with this code may lead to decreased engine performance and potentially cause damage to other components over time. It's recommended to address the issue promptly.
6. How much does it typically cost to repair OBDII code P1402 in a Cadillac related to the Exhaust Gas Recirculation supply circuit?
The cost of repair can vary depending on the specific issue causing the code, but it may range from $100 to $500, including parts and labor.
7. Is it safe to continue driving my Cadillac with OBDII code P1402 present?
While the vehicle may still be operable with this code present, it's advisable to address the underlying issue promptly to prevent any further damage and ensure optimal performance.
8. Can I reset the Check Engine light after repairing OBDII code P1402 in my Cadillac?
Yes, once the underlying issue triggering the code has been resolved, the Check Engine light can be reset using an OBDII scanner or by disconnecting the car's battery for a short period.
9. Are there any preventative maintenance steps I can take to avoid OBDII code P1402 in the future?
Regularly servicing the EGR system, using high-quality fuel, and keeping up with recommended maintenance schedules can help prevent issues related to the EGR supply circuit and OBDII code P1402.
10. How long does it usually take to repair OBDII code P1402 in a Cadillac at a professional auto repair shop?
The repair time can vary based on the exact cause of the issue, but typically, it may take anywhere from 1 to 3 hours to diagnose and fix the problem at a reputable auto repair shop.
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