pulled 4 codes no CEL - Maintenance and Repair Forum

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pulled 4 codes no CEL
Sunday, July 10, 2005 6:03 PM
I got my codes pulled today I got 4 of them, my car has stalled on me twice, once when I was parked during the winter and once when I was backing up on a street. I also have a slight problem with fuel economy, i'm getting like 19-20mpg, but I still got spark plugs to change. Maybe this might be causing the fuel economy problem also!
These codes were registered:
DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage
DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
P1298 - pending - Listed as a Lean operation at WOT
DTC P1509 Idle Speed High - Idle Air Control (IAC) System Not Responding

I have no CEL and my car is a 2001 Cavalier 2.4 what do you guys think the problem could be?

Re: pulled 4 codes no CEL
Monday, July 11, 2005 4:37 AM
anyone the car has about 55k miles on it and Ive had it since Jan 2005?
Re: pulled 4 codes no CEL
Monday, July 11, 2005 6:26 AM
DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage

The computer monitors every sensors voltage, if it goes to far above or below a set limit it will throw a code.

DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage

The computer monitors every sensors voltage, if it goes to far above or below a set limit it will throw a code.

The sensors could be bad, would be my first guess. You need a scan tool to monitor voltage of them.


- 2004 Cavalier - 124k, owned since new



Re: pulled 4 codes no CEL
Monday, July 11, 2005 7:35 AM
Jacob B wrote:I got my codes pulled today I got 4 of them, my car has stalled on me twice, once when I was parked during the winter and once when I was backing up on a street. I also have a slight problem with fuel economy, i'm getting like 19-20mpg, but I still got spark plugs to change. Maybe this might be causing the fuel economy problem also!
These codes were registered:
DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage
DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
P1298 - pending - Listed as a Lean operation at WOT
DTC P1509 Idle Speed High - Idle Air Control (IAC) System Not Responding

I have no CEL and my car is a 2001 Cavalier 2.4 what do you guys think the problem could be?


i had the same code. thats funny because mine make my cel come on. check the harness going to the sensor. i replaced my sensor thinking it was that but it turned out to be a broken wire on the harness.



Re: pulled 4 codes no CEL
Monday, July 11, 2005 4:51 PM
Finding the broken wire is gonna be a pain theres so much in there, I got 2 to deal with. I woncer if these things are still broken?
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