1996 ES 300...OBDII giving P0115 code...overheating.
08-24-07, 06:39 AM
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1996 ES 300...OBDII giving P0115 code...overheating.
Overheating problem.
This morning while driving for 30 min, with the A/C on, I noticed that at one point in my trip I was idling in traffic for a while when I noticed my temp gauge going up to red drastically. Then the engine started smoking from the coolant reservoir side. I opened the hood to find the coolant ABOVE the full line and bubbling hot. It was so hot, the rubber cap had popped off and coolant was bubbling out of the coolant reservoir (overflow tank). Immediately afterwards, a check engine light came on. I read it with the OBDII and it stated the following:
P0115
Engine Coolant Temp
Circuit Malfunction
Is this a CTS (coolant temperature sensor) problem? The radiator has been changed and has no leaks so that's not the culprit. I was thinking it was either a bad water pump and/or thermostat but I didn't notice any coolant coming out of that area this morning, however, I do want to change the water pump and thermostat soon. But for right now, I need to find out a quick fix to this overheating problem.
The engine only overheats when the A/C is on too. I also noticed the fan wasn't spinning as fast as I think it should be.
So should I change the sensor first to see if it fixes the problem? Each auto store I've gone to to try and find a CTS it isn't the right one and is significantly smaller than the one I pulled off that was located by one of the radiator hoses on the right side of the engine (standing in front of it). Or does the 96 ES 300 have another coolant type sensor I'm not aware off?
Somebody knowledgeable in this area, please help. Much thanks in advance.
This morning while driving for 30 min, with the A/C on, I noticed that at one point in my trip I was idling in traffic for a while when I noticed my temp gauge going up to red drastically. Then the engine started smoking from the coolant reservoir side. I opened the hood to find the coolant ABOVE the full line and bubbling hot. It was so hot, the rubber cap had popped off and coolant was bubbling out of the coolant reservoir (overflow tank). Immediately afterwards, a check engine light came on. I read it with the OBDII and it stated the following:
P0115
Engine Coolant Temp
Circuit Malfunction
Is this a CTS (coolant temperature sensor) problem? The radiator has been changed and has no leaks so that's not the culprit. I was thinking it was either a bad water pump and/or thermostat but I didn't notice any coolant coming out of that area this morning, however, I do want to change the water pump and thermostat soon. But for right now, I need to find out a quick fix to this overheating problem.
The engine only overheats when the A/C is on too. I also noticed the fan wasn't spinning as fast as I think it should be.
So should I change the sensor first to see if it fixes the problem? Each auto store I've gone to to try and find a CTS it isn't the right one and is significantly smaller than the one I pulled off that was located by one of the radiator hoses on the right side of the engine (standing in front of it). Or does the 96 ES 300 have another coolant type sensor I'm not aware off?
Somebody knowledgeable in this area, please help. Much thanks in advance.
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