Dash light
 

Help!
Put in a new coolant sensor on my '92 LT1. First unplugged the sensor(MAF?) on the intake, then took out the old coolant sensor and put in the new one. Refilled the lost coolant, put the intake back together and started the car before plugging in the sensor on the intake. Stopped the car, topped off the coolant, plugged in the sensor on the intake, started the car and now the "Service Engine Soon" warning on the dash will not go out. The car runs fine, except for the warning. Called the local Chev. dealer who would not help. Only advised me to bring it in in two weeks. Is there anything I can do to get the warning message to go out?

RE: Dash light
 

Check your codes....Then post them back and *we* can help solve your problem.

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Disconnect battery for 1 min, that will clear codes. Your probably set a coolant temp sensor code by starting the car with it not plugged in. BTW, it a CTS abb. MAF is for Mass Air Flow. [8D]

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Thanx for responding. I not real up on the computer stuff. How do I get the "codes"?

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Thanx for the response. Disconnected the negative batt. terminal for a min. or so. Reconnected andthe lite comes on again!

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This is how its done ON MY YEARS COMPUTER SYSTEM. Yours may be different. I know autozone checks it for free but this you can do yourself.

First locate your car's alcl
this component is located just below the instrument panel and
to the left of the center console. Remove the plastic cover
the first two slots to your right are the A & B slots for a drawing of
the alcl module's picture is added below.
The A slot is the diagnostic slot and the B slot is the ground
slot. insert the computer key into these slots (with the engine
off) this is very important...now only put the ignition key
to on ( not start !!!) the check engine light will display a
code 12 which is one flash followed by two flashes.
this code will be flashed three times ..followed by the
trouble code stored in your car's computer.
what ever the code is it will be flashed three times.
have a paper and pencil ready and write down the
code .

code 13 =1 flash followed by 3 flashes =>oxygen sensor
code 14 =1 flash followed by 4 flashes =>coolant sensor
code 15 =1 flash followed by 5 flashes =>coolant sensor
code 21 = 2 flashes followed by 1 flash =>throttle position sensor
code 22 = 2 flashes followed by 2 flashes=> throttle position sensor
code 23 = 2 flashes followed by 3 flashes=> manifold air temp sensor
code 24 = 2 flashes followed by 4 flashes=> vehicle speed sensor
code 25 = 2 flashes followed by 5 flashes=> manifold air temp sensor
code 32 =>egr system
code 33 =>map sensor
code 34 =>maf sensor
code 35 => idle air control
code 41 => cylinder select error
code 42 => electronic spark control
code 43 => electronic spark control
code 44 => lean exhaust
code 45 => rich exhaust
code 51 => PROM
code 52 => fuel calpak
code 53 => system over voltage
code 54 => fuel pump circuit
code 55 => ecm
code 62 => oil temp

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Thanx again, unfortunately I don't have a diagnostic tool, so I guess I'm at the mercy of the dealer. Oh well

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Diagnostic tool? I use a paperclip...

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or take it to autozone, they will do it for free.

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Paperclip? Ah, American ingenuity! HOW?

Thanx

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take the cover off the diagnostic terminal that is located underneath the steering wheel/dashboard area and closest to the radio consol. Locate the the top 2 terminals on the right. Jump these 2 terminals, or take your paper clip and insert one end into each terminal. Then turn the key to the 'on' position. on mine the radiator fans will turn on, and you will notice the SES (service engine soon) light begin to flash. Take note of the two-digit codes that will flash. You will get a code 12 (one flash-pause-two flashes) that indicates your ECM is in diagostic mode, and nothing else (this is good.) Code 12 will repeat 3 or so times and then any codes that are stored will then be display, repeating each code 3 times before moving on to the next code. IF there are no codes remaining, code 12 will be displayed again, indicating the dianostic process is complete.

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Thanx for the info. Gonna try it 1st thing in the AM. Hope the car don't blow up! Otherwise, maybe, just maybe, there'll be a '07 06 under the tree.

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AZ here in Raritan NJ will only do it if it's OBDII(?). Somethings telling me I gotta get up to speed on automotive computers and I'm just now gettin the hang of this computer(I think).

Thanx

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Raisinbran; Black86; mech259.

Went to local Chev place this AM. They first told me that there was a "defective" coolant sensor. Then they found that the sensor, in fact, was not bad but rather the wire lead to the sensor was bad. So they put on a new plug and Bingo! everythings OK.

Thanx for all your help and if you need anything in NJ, lemme know.

Breeze
Neshanic Station, NJ

RE: Dash light
 

:D YAY. Problems solved.