Check Engine Light On

vetteman52 · 03-11-2010, 05:54 AM

My check engine light is on. I have scanned the diagnostics and get P0174, and P0171, I have removed and cleaned the MAF. I continue to get the same codes. Does anyone have any suggestions as to what to do next?

Slicktop · 03-11-2010, 06:36 AM

http://www.gearchatter.com/viewtopic10055.php

Items 4 and 5 might apply since you are lean on both banks............

Bobby1 · 03-11-2010, 07:49 AM

take the check engine light bulb out--works on 4 other cars i owned-

Slicktop · 03-11-2010, 08:08 AM

Not smart, lean running can burn valves and also OBD2 cars are plugged into during the smog check and queried for codes. Also, the smog technician checks for a check engine light illumination after turning on the ign before starting the engine. It must be operational.

Stupid posts are useless............

airwolf99 · 03-11-2010, 07:09 PM

Running lean would not be something I would do.

vetteman52 · 03-13-2010, 04:14 AM

Thanks eveone for your suggestions. I have been running a 10% ethanol fuel mixture. Could this possibly be the cause?

wascapsfan · 03-13-2010, 07:14 AM

I believe that the code must be cleared regardless of making the fix. This is because the cpu stores the info.

CorvetteDon · 03-13-2010, 08:52 AM

Quote:

Originally Posted by vetteman52

My check engine light is on. I have scanned the diagnostics and get P0174, and P0171, I have removed and cleaned the MAF. I continue to get the same codes. Does anyone have any suggestions as to what to do next?

Check for vacuum leaks downstream of the MAF sensor.

It could also be a defective MAF sensor. Some have leaked silicone used to protect their circuitry, causing them to fail.

David Reeves · 03-13-2010, 08:27 PM

Open the hood and check the engine. If it is still there, close the hood and ignore the light. This stuff is so simple a fool could do it. lol

:toil et:

03-11-2010, 05:54 AM	#1
vetteman52 Smokin Member Join Date: Mar 2010 Location: Texas Posts: 18 Smokin' Bucks $5.68 My Gallery	Check Engine Light On My check engine light is on. I have scanned the diagnostics and get P0174, and P0171, I have removed and cleaned the MAF. I continue to get the same codes. Does anyone have any suggestions as to what to do next?

03-11-2010, 06:36 AM	#2
Slicktop Smokin 500HP Club Join Date: Dec 2008 Location: Fairfield, California Posts: 732 Smokin' Bucks $13.87 My Gallery	http://www.gearchatter.com/viewtopic10055.php Items 4 and 5 might apply since you are lean on both banks............ Last edited by Slicktop; 03-11-2010 at 06:38 AM.

03-13-2010, 04:14 AM	#6
vetteman52 Smokin Member Join Date: Mar 2010 Location: Texas Posts: 18 Smokin' Bucks $5.68 My Gallery	p0171,p0174 Thanks eveone for your suggestions. I have been running a 10% ethanol fuel mixture. Could this possibly be the cause?

03-13-2010, 08:27 PM	#9
David Reeves Smokin 100HP Club Join Date: Dec 2009 Location: Troy, Alabama Posts: 104 Smokin' Bucks $9.55 My Gallery	Open the hood and check the engine. If it is still there, close the hood and ignore the light. This stuff is so simple a fool could do it. lol:toil et:

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03-11-2010, 07:49 AM	#3
Bobby1 Smokin 100HP Club Join Date: Nov 2008 Posts: 113 Smokin' Bucks $2.35 My Gallery	take the check engine light bulb out--works on 4 other cars i owned-

03-11-2010, 08:08 AM	#4
Slicktop Smokin 500HP Club Join Date: Dec 2008 Location: Fairfield, California Posts: 732 Smokin' Bucks $13.87 My Gallery	Not smart, lean running can burn valves and also OBD2 cars are plugged into during the smog check and queried for codes. Also, the smog technician checks for a check engine light illumination after turning on the ign before starting the engine. It must be operational. Stupid posts are useless............

03-11-2010, 07:09 PM	#5
airwolf99 Smokin 300HP Club Join Date: Dec 2007 Location: Cleveland, OH Posts: 358 Smokin' Bucks $4.20 My Gallery	Running lean would not be something I would do.

03-13-2010, 07:14 AM	#7
wascapsfan Smokin 50HP Club Join Date: Jul 2008 Location: atlanta Posts: 76 Smokin' Bucks $2.74 My Gallery	I believe that the code must be cleared regardless of making the fix. This is because the cpu stores the info.