GMC P1404: EGR Valve Closed Position Performance
Is your scanner showing GMC P1404?
No worries. We'll show you what it means and how to deal with it.
GMC P1404: EGR Valve Closed Position Performance
OVERVIEWWhat Does The GMC P1404 Code Mean?
Engine started; ECT sensor from 176-248ºF, IAT sensor below 212ºF, VSS over 10 mph with the Desired EGR position over 15%, then the PCM detected the EGR Position was 0.29v over the EGR learned minimum position with the desired EGR position at 0%.
What Are The Potential Causes Of The GMC P1404 Code?
- EGR sensor signal circuit is shorted to VREF or system voltage
- EGR sensor VREF circuit is shorted to system power
- EGR sensor ground circuit is open or has high resistance
- EGR sensor is damaged or has failed (sensor/solenoid unit)
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> GM Genuine EGR Valve Temperature Sensor
>>> EGR Valve with Gasket
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
2005 6.6L (LLY) Duramax Diesel ENGINE DIAGNOSTIC PARAMETERS for P1404 – General Motors, page 15.
