1992 Chevy Astro engine dying

HARDEN

MEMBER
1992 CHEVROLET ASTRO
6 CYL
AWD
AUTOMATIC
15,000 MILES

Hi,
I have a problem with my van, which usually runs and starts fine. Twice in the last week when I came to a stop it instantly died, no warning at all. The first time in a parking lot so I just went shopping and tried starting it when I came out of the store, about 20 minutes, and it started instantly. The same the second time. Got home and started checking and got trouble code 15, coolent sensor/low temp. Both time the guage was reading normal, so my question is, how can the guage read normal and the trouble code show bad? I hope this is the problem but I have my doubts, but don't know where else to look. Also I can't get it to do it at home. Any help would be appreciated Thank you

3 Replies

INTERNETMECHANIC

MECHANIC
700 POSTS

Hi, there is a sending unit for the temp gage and then there is a coolant temp sensor, two different sensors, if you want to word it that way. The cts wouldn't control the temp gage. My info for the code 13 says high voltage on circuit. The cts shares a ground circuit with another sensor, if that sensor was causing a problem, it could cause a problem for the cts, no ground. Depending on the vin of your vehicle, the cts will share ground with tps or map. I'd want to see what those sensors are doing? I'd also want to check the idle air system, that may mean cleaning the throttle-body bore and passages, plus checking the idle air control sensor and throttle position sensor.

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Saturday, June 12th, 2010 AT 12:57 PM

HARDEN

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1 POST

Hi,
Thank you for your reply. I think you misread my post, it is trouble code 15. I forgot to mention, it is the ( W ) engine. The CTS is located by the thermostat housing left of the EGR valve, bummer to get to, but then where would the guage temp. Sensor be? Or am I getting them mixed up? Again, I appreciate your help Thank you

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Saturday, June 12th, 2010 AT 2:09 PM

INTERNETMECHANIC

MECHANIC
700 POSTS

Sorry for the typo, I did look at code 15 then typed 13 in the post. The temp switch on left side of engine, rear, says MOD, It didn't give a picture. It would be a 1 wire connector, sorry, don't have wiring color. I have no direct knowledge that you have a temp switch. I looked at MOD and a partsbook.

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Saturday, June 12th, 2010 AT 3:52 PM