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DTC P1402: EGR Function: Procedure

  1. Check vacuum lines and hoses for cracks, clogging or improper connection. Repair as necessary and go to next step.
  2. Raise and support vehicle enough to allow drive wheels to clear floor. Start engine and warm to operating temperature. Place shift lever in "1" position and operate engine at 2000 RPM. If EGRC solenoid valve can be heard operating with engine running, go to next step. If EGRC solenoid valve cannot be heard operating with engine running, check EGRC solenoid valve. See DTC P1400: EGR CONTROL (EGRC) SOLENOID VALVE .
  3. If EGRC solenoid valve is okay, check EGR valve. See SYSTEM/COMPONENT TESTS article for testing EGR valve. Replace as necessary. If EGR valve is okay, check EGRC backpressure transducer valve. See DTC P0402: EGR CONTROL BACKPRESSURE TRANSDUCER (EGRC-BPT)  VALVE. Replace as necessary. If EGRC backpressure transducer valve is okay, go to next step.
  4. Check circuit harness connectors for terminal damage or corrosion. If connectors are okay, check EGR temperature sensor. See DTC P1401: EGR TEMPERATURE SENSOR . Replace as necessary.
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