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I have the same problem as the guy six yeas ago. EGR

Customer Question
I have the same...

I have the same problem as the guy six yeas ago. EGR position sensor codes and fuel pump circuit codes. No drivability problems. I changed the EGR sensor twice. Also changed fuel pump relay and checked fuse. I also cleaned all of the grounds that I could find. 2000 GMC YUKON XL 6.0.

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

I will get the codes tomorrow and contact you.

Submitted: 2 years ago.Category: GM
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Answered in 1 minute by:
1/25/2016
GM Mechanic: GM Tech (Cam), GMC Mechanic replied 2 years ago
GM Tech (Cam)
GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 30,421
Experience: GM Grand Master Technician 2007. 14 years experience.
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Hi there, I am Cam. Can I get your first name please?

Can you tell me the code numbers pleasE?

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Customer reply replied 2 years ago
Carl. I will get the codes. I didn't write them down. I will get back to you in a few hours.
GM Mechanic: GM Tech (Cam), GMC Mechanic replied 2 years ago

That would be fine Carl. Save the link and reply back when you get them.

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Customer reply replied 2 years ago
Codes are P0230 and P0404. They usually happen at the same time. Both voltage values and ground are correct at EGR connector. Again there are no drivability problems. The problem is intermittent and doesn't happen right away after codes are cleared.
GM Mechanic: GM Tech (Cam), GMC Mechanic replied 2 years ago

Ok so do they happen at the same time?

Is there any chaffed wiring in the underwood fuse block or around the PCM? If all that is good then Ia m thinking its a problem inside the Powertrain Control Module (PCM). It reads and controls both and with both operating normally, its the device checking afterwards that is causing the issue, and thats the PCM.

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Customer reply replied 2 years ago
Checked all and cleaned all contacts under fuse box. I'll try cleaning PCM connector then try new PCM if you think that should be the next procedure.
GM Mechanic: GM Tech (Cam), GMC Mechanic replied 2 years ago

If your certain the wiring is all good then, and the areas I suggested are good then I think its the next place to look.

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Customer reply replied 2 years ago
I will double check wiring
GM Mechanic: GM Tech (Cam), GMC Mechanic replied 2 years ago

OK, let me know what you find.

Please bookmark this page so you can easily navigate back to it so we can continue the discussion. This is done by pressing (CTRL D on PC and CMD D on Mac). You can reply at any time for follow up information regarding this issue, even after you rate the site and I will reply.

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