service engine code

snarfman

01-18-2007, 02:16 PM

2000CAYukon

01-18-2007, 05:06 PM

I have the service engine light on Took it to autozone and they read the code and said it was code "P1406 EGR postion sensor performance"
Dealer said there is no postion sensor just the EGR valve and other stuff.
Any idea what this code means. Its on a 1996 sub 454 4x4 k2500
Thanks

OBD II Codes can be used by more than one auto maker. Autozone gave you the meaning for P1406 but unfortunately not for GM.

For GM is means:
DTC P1406 EGR Valve Pintle Position Circuit

The PCM controls the EGR and it detected that it is not responding. You could replace the EGR or have someone with a scan tool diagnose the EGR valve.

//2000CAYukon

MT-2500

01-18-2007, 08:37 PM

GMMerlin

01-20-2007, 05:19 AM

I have the service engine light on Took it to autozone and they read the code and said it was code "P1406 EGR postion sensor performance"
Dealer said there is no postion sensor just the EGR valve and other stuff.
Any idea what this code means. Its on a 1996 sub 454 4x4 k2500
Thanks
Dealer is wrong, position sensor is part of the valve.
The VCM constantly monitors the linear EGR valve pintle position sensor in order to ensure that the valve is responding properly to the commands from the VCM.
The following conditions will set the DTC:
EGR pintle position signal indicates a voltage out of the normal range of the pintle position sensor, or a signal that is 10% greater or less than the VCM commanded position
Ignition voltage greater than 9 volts
Typically the sensor or valve schew, Test the sensor circuits first.

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