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Thread Starter
On The Tree
Joined: Jan 2008
Posts: 107
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From: bay area
Help my camaro has the fans constantly on while the car is on and i have to give it gas to start i have a 97 camaro i have the engine light on its a coolant temp code but i forgot the number i already changed the sensor that goes inside the water pump housing but its still on even when the code was erased ill try to get the code as soon as i get the scanner again.and its also taking a long time for the temperature on the gauge to rise
Good suggestion above, coolant leve. Isn't there another temp sensor on the driver side head? I melted one of the wires to it with my headers once and threw the temp code, ran new wiring, re-routed, etc. The actual wire at the sensor was melted/old, ran new wiring and used some pro-heat sleeving with a new sensor, problem solved.
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Well, it takes forever for the gauge to rise because the fans constantly running keep it a heck of a lot cooler. Could be hard to start because of the additional power going to the fans right away, though it shouldn't be drawing that much. I believe there should be two temp sensors, so either one of them could be bad (that's what the guy I bought my car from told me). it's also possible to have a bad sensor right out of the box, so make sure any new ones that you buy are good. after taking everyone else's advice and checking all of your sensors and wiring, I'd try replacing the ecm. it's possible it's sending the wrong signals.
Thread Starter
On The Tree
Joined: Jan 2008
Posts: 107
Likes: 0
From: bay area
SO I WAS LOOKING UP SOME INFO AND SAW THIS
The engine coolant temperature (ECT) sensor is a thermistor screwed into a coolant passage in the cylinder head. Sensor resistance is high when coolant temperature is low and resistance drops when coolant temperature increases. The powertrain control module (PCM) provides a 5 volt reference and a ground to the sensor. The PCM monitors voltage drop to determine coolant temperature. If the ECT reads less than freezing temp. when engine has been running for more than a few minutes, the PCM determines a circuit fault and sets this code. Or if the PCM determines the sensor resistance is out of specs, this code is set
The engine coolant temperature (ECT) sensor is a thermistor screwed into a coolant passage in the cylinder head. Sensor resistance is high when coolant temperature is low and resistance drops when coolant temperature increases. The powertrain control module (PCM) provides a 5 volt reference and a ground to the sensor. The PCM monitors voltage drop to determine coolant temperature. If the ECT reads less than freezing temp. when engine has been running for more than a few minutes, the PCM determines a circuit fault and sets this code. Or if the PCM determines the sensor resistance is out of specs, this code is set
Would the car still be able to run without the pcm working? i know it sounds dumb but I've heard of some car's being able to run without the pcm working.
Anyone that wants to correct me is more than welcome too. As always, this is just what I've gathered from being around the forum and some shops. I could be completely misinformed here.
just to clarifiy a bit also the two sensors control two different things.....the sensor in the cylinder head controls just the gauge on the dash and the sensor in the waterpump is what the ECM gets its temp reading off of......at least thats what my schematic im looking at is showing me
