Engine light came on......

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Dec 25, 2006 | 08:31 PM

silverminevette

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Melting Slicks

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From: New Orleans La.

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St. Jude Donor '03-'04-'05-'06

Engine light came on......

The engine light came on in the middle of a huge downpour. The codes are P0172 and P0175. Fuel Trim System Rich Band 1 and Fuel Trim System Rich Band 2. I've searched with no luck. Any ideas are welcome.
Thanks.

Dec 25, 2006 | 09:24 PM

Bill Curlee

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From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

What year car is it and do you have any aftermarket air intake system. Bottom feeders and VARARAM will ingest moisture (its normal and usually wont hurt anything except throw those codes). I have a VARARAM and I get those codes if I drive in very heavy rain storms.

You don't have to hit any large puddles to get moisture in the intake track. If you submerge the front end, your going to have more issues than DTC's

I would say just clear the codes and you should be fine.

BC

Dec 25, 2006 | 10:03 PM

silverminevette

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Melting Slicks

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From: New Orleans La.

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St. Jude Donor '03-'04-'05-'06

Thanks for your reply....It's a 98 coupe and I have replaced the intake with the Z06 intake. By clearing codes do you mean using the reset button? What are DTC's ?

Dec 25, 2006 | 10:13 PM

Bill Curlee

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From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

If you have a GM Stock intake air filter, water ingestion shouldn't be too much of a problem. Water could have ran in from the opening in the hood area between the bumper and the hood. You can also check the intake tract for having a proper seal. The duct between the throttle body and the MAF needs to be air tight so no unmetered air gets in. If you have a stock air bridge, clamping the hose clamp too tight can collapse it, allowing air to enter. Check the intake ducting for a good seal. Let me know what you find.

BC

Dec 25, 2006 | 10:17 PM

silverminevette

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Melting Slicks

Joined: Nov 2003

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From: New Orleans La.

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St. Jude Donor '03-'04-'05-'06

I have replaced the intake with the Z06 intake. By clearing codes do you mean using the reset button? What are DTC's ?

Dec 25, 2006 | 10:24 PM

Bill Curlee

Tech Contributor

Joined: Dec 1999

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From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

All C5s have a built in Code reader. Here is a website that gives you directions on reading the codes and definitions for all the codes. If you go into manual mode in the code reading routene and press reset for each code listed, it will clear the code. If the code is listed as C current, it will come back. Sometimes immediately! If it is H history, you should be good to go.

This is the absolute best C5 Code web site!!!

http://www.corvettedoctor.com/Code_Main.html

www.corvettedoctor.com

http://www.corvettedoctor.com/index.html

Here is another very good site:

http://www.obd-codes.com/trouble_cod...d-ii-codes.php

BC

Dec 25, 2006 | 10:27 PM

tomas721

Instructor

Joined: Oct 2006

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From: Carrollton TX

DTC = Diagnostic Trouble Code.

Dec 25, 2006 | 10:52 PM

silverminevette

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Melting Slicks

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From: New Orleans La.

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St. Jude Donor '03-'04-'05-'06

Thanks...I'll give that a try.

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Dec 26, 2006 | 03:04 PM

silverminevette

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Melting Slicks

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From: New Orleans La.

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St. Jude Donor '03-'04-'05-'06

I have attempted to clear the codes.They do not clear, and the check engine light remains. Any other thoughts?

Dec 26, 2006 | 06:14 PM

#10

Bill Curlee

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From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

If you have entered the "manual" diagnostic DTC code routine, properly, selected the 10 PCM module and are displaying one of the DTC's and then press and "H O L D" the reset button until the DTC's clear, I would check the filter and see if it got wet and is now clogged. A wet filter can cause it to flow less air and cause the engine to run rich.

What letter code is displayed after the DTC?? It will look like this:

10 PCM 0172 C or 10 PCM 0172 H.
It could also have a 10 PCM 0172 HC

BC

Dec 27, 2006 | 10:47 PM

#11

silverminevette

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Melting Slicks

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From: New Orleans La.

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St. Jude Donor '03-'04-'05-'06

The codes were current - C. I didn't drive it yesterday but this evening I did. The light was on and after driving about 15 minutes the light went out. Yeah! I will try to clear the codes again. I was not HOLDING the reset so that was probably why they didn't clear. Thanks for your insight.