Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P1402: EGR Function: Description
This system cuts and controls vacuum applied to the EGR valve to suit engine operating conditions. This cut-and-control operation is accomplished through the ECM and the EGR Control (EGRC) solenoid valve. When the ECM detects any of the following conditions, current flowing through the solenoid valve is cut. This causes the vacuum to be discharged into the atmosphere. The EGR valve remains closed.
- Low engine coolant temperature.
- Engine starting.
- High-speed engine operation.
- Engine idling.
- Excessively high engine coolant temperature.
- Mass airflow sensor malfunction.
- Low intake air temperature.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.