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01-16-2010, 09:30 PM
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#1 |
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Registered User
 Join Date: Dec 2003
Location: Indy
Posts: 326
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Engine light on @ idle
Hi everyone,
My son has a 1993 S-10. The engine light comes on whenever he puts it in park and lets it idle. If you put it back in gear, the light goes off. He took it to Advance Auto to have the codes checked, but it was to old for their equipment. Anybody seen this before? Thanks, Tom |
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01-16-2010, 11:18 PM
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#2 |
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blood type; Retumbo
Join Date: Jan 2004
Location: next to my reloading bench
Posts: 10,269
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Re: Engine light on @ idle
"too old for their equipment"?! they don't have a $2 code key?!
jumper pins A and B, turn key on, and watch the light flash the codes. flash...flash-flash (3 times = code 12, OK now it's time for the problem codes)...longer pause, then (example) flash-flash-flash-flash...flash-flash-flash-flash-flash 3 times (example) means code 45 (rich exhaust IIRC) it will cycle through the codes in numerical sequence with a long pause in between and then go back to a 12 signifying the cycle is complete. |
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01-18-2010, 01:40 PM
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#3 |
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Registered User
Join Date: May 2004
Location: Minnesota
Posts: 4,621
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Re: Engine light on @ idle
Here are some web sites with the basics on retrieving codes from the ECM without a scan tool or code reader.
Poor drawing of ALDL/DLC but ok instruction + codes http://www.cfm-tech.com/gm_tbi_trouble_codes.htm OBD1 terminal identification http://robertpowersmotorsports.frees.../ALDL_plug.jpg OBD1 illustration and instructions http://www.troublecodes.net/GM/ |
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