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Chevy S10 - GMC S15 and Sonoma Warning lights and trouble codes

76 messages,  Last post on Nov 10, 2009 at 12:39 PM

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#26 of 76 Re: service engine lite..fuel composition circuit high input [binmt] by km59 Feb 12, 2007 (12:35 am)
Replying to: binmt (May 31, 2006 2:49 pm) Hi,I own a 2001 Chevy S10 ExtCab LS 2WD(2.2L 4cyl)I'm having the same problems except my Fault Codes ARE PO178 AND PO179 , I've cleared the codes but they come right back.Both are Fuel Composition Sensor Circuit High input and low input, I'm going crazy cause i can't pass inspection because of this. The dealership says it will run about $1500 to replace the fuel sensor and clean out my gas tank and replace a new fuel pump in the tank!!!! I don't have that kind of money. I know this is not helping your problem but i was hopeing someone like yourself might have gotten some new info that might help and if you can relay it to me i would be very grateful.
#28 of 76 Re: service engine lite..fuel composition circuit high input [binmt] by km59 Feb 25, 2007 (11:01 pm)
Replying to: binmt (May 31, 2006 2:49 pm) If you already have fixed your problem great, but i had to change out the FCS Which is located on the right front/pass frame rail and behind the fender wheel housing which i had to take out in order to get to the sensor. Also i needed a Fuel Line Disconnect Tool Set i bought at a local auto parts for $8.00 to get the 2 fuel lines off of the old sensor. It only has two bolts and a electical connection you need to unplug to take out, also relieve any fuel pressure before making repair.
#29 of 76 re- unknown engine light by 96sten Feb 26, 2007 (6:45 pm)
My check engine light came on recently after I replaced the alternator. I don't know if the two are related. My gas cap is on tight, my fuel filter is brand new, new brake pads on the front and all fluids are good. How to diagnose why the *#! light is on? Replies to this message: jneal (Mar 03, 2007 3:27 pm)
#30 of 76 Re: re- unknown engine light [96sten] by jneal Mar 03, 2007 (3:27 pm)
Replying to: 96sten (Feb 26, 2007 6:45 pm) If the light came on immediately after replacing the alternator I would say they are probably related. However, no one can guess at what may be causing the light to come on without at least knowing what code is stored. Go by AutoZone and get the code or codes read and come back and post and someone should be able to offer a bit more guidance.
#31 of 76 Code 42 on 1991 Sonoma by john266 May 20, 2007 (9:53 am)
#32 of 76 Code 42 on 1991 Sonoma by john266 May 20, 2007 (9:53 am)
Has anyone every got a code 42 on a 4.3L S10/Sonoma? My truck trips the check engine light sometimes when I am idling, and the code is 42. Code 42 is supposed to be something related to electronic spark timing, but I dont know what to fix or replace. Any help? Replies to this message: engineer_rob (Sep 21, 2009 11:12 pm)
#33 of 76 ABS light is on by fast43 May 28, 2007 (4:01 pm)
#34 of 76 ABS light is on by fast43 May 28, 2007 (8:02 am)
The ABS light on my 2002 2.2l came on. Is there anything I can check before I take it somewhere? Replies to this message: hoodlatch (May 28, 2007 4:01 pm)
#35 of 76 Re: ABS light is on [fast43] by hoodlatch May 28, 2007 (4:01 pm)
Replying to: fast43 (May 28, 2007 8:02 am) One item you can check that won't cost anything. Crawl under it and check out the wires and associated plugs that go to the wheel sensors. Maybe you ran over some debris in the highway and knocked a wire loose. Sometimes stuff happens. I had that problem with my kid's car and fortunately all I had to do was replace the wheel sensor, which wasn't complicated at all.

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