Chevrolet P1407: Exhaust Gas Recirculation (EGR) Motor Control Circuit Shorted

What Does The Chevrolet P1407 Code Mean?

P0489, P0490, P1407, P140D, P140E and P140F The Ignition is ON. The battery voltage is greater than 11 V. The EGR control circuit is active. The starter is not cranking. The DTCs run continuously when the above conditions are met.

The ECM detects a short circuit condition of the EGR Valve motor control circuits for greater than 3 s.

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

• GM, 2013, Service Bullettin – Prior To Any Circuit Testing.
• GM, 2014, Service Bullettin – Instrument Panel Cluster (IPC) Warning Lamps And/Or MIL Are Illuminated Diesel Exhaust Fluid (DEF) Message Displayed Various DTCs Set (Inspect Wiring Harnesses
  for Chafing).
• GM, 2016, Service Bullettin – Instrument Panel Cluster (IPC) Warning Lamps And/Or MIL Are Illuminated Diesel Exhaust Fluid (DEF)
  Message Displayed Various DTCs Set (Inspect Wiring Harnesses for Chafing).
• GM, 2020, Service Bullettin – PIT5751A SES MIL / Reduced Engine Power / Misre / IPC Gauges
  Sweep / IPC Warning Message / Loss Communication / Various DTCs / Blown Fuse (Inspect Engine Harness 3.0L Diesel).
• GM, 2020, Service Bullettin – PIT5751B SES MIL / Reduced Engine Power / Misre / IPC Gauges
  Sweep / IPC Warning Message / Loss Communication / Various DTCs / Blown Fuse (Inspect Engine Harness 3.0L Diesel).