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I just purchased my '07 vette in the last couple days. It has 2 (technically 4) codes.
P2068
P2068 historic
P0113
P0113 historic
I know 2068 is fuel level sender related. Likely has to do with sitting with under 1/4 for too long before I purchased. I've since put 2 bottles of Chevron with Techron Plus on top of a full tank of 93 because I had no idea about the level sender issue.
P0113 I know is IAT sensor. I tried another 5wire MAF (of unknown condition) that I had sitting around. No change. Cleaned the MAF that came out and reinstalled. Still no change.
Help?
Last edited by TheRuckus; Apr 6, 2023 at 06:05 AM.
Reason: Year of car
What year is the car ??…the P0113 is a “circuit” or wiring trouble code so did you check the circuit with a DVOM ??…it’s a 2 wire thermistor with a 5 volt reference and a “low reference” which is an ECM ground…you should see less than 100mv’s on sensor grounds (engine running back probed at sensor)…wiring below for an ‘07 so you have 2 tan wires…terminal B is the 5 volt ref and A is the low ref…what does the IAT read with your scan tool ??…with a “high circuit” code you are probably seeing a minus IAT temperature like -30 or -40…could be a bad ground or sensor or no 5 volt ref to the sensor itself maybe an open in the wire between the ECM and the sensor.
What year is the car ??…the P0113 is a “circuit” or wiring trouble code so did you check the circuit with a DVOM ??…it’s a 2 wire thermistor with a 5 volt reference and a “low reference” which is an ECM ground…you should see less than 100mv’s on sensor grounds (engine running back probed at sensor)…wiring below for an ‘07 so you have 2 tan wires…terminal B is the 5 volt ref and A is the low ref…what does the IAT read with your scan tool ??…with a “high circuit” code you are probably seeing a minus IAT temperature like -30 or -40…could be a bad ground or sensor or no 5 volt ref to the sensor itself maybe an open in the wire between the ECM and the sensor.
explain this to me like I've been hit in the head a few too many times, please.
Check resistance between the 2 tan wires in the MAF?
It looks like you have a 5 wire IAT/MAF sensor so 3 wires are for the MAF and 2 wires are for the IAC…the IAT are the tan wires….disconnect the connector and with the ignition in the run position you should see 5 volts on one of those 2 wires…do you know how to back probe a wire in a connector…watch the video…you can use something like a thin needle to backprobe…hook the connector back up and with negative lead of voltmeter on battery ground back probe the other tan wire with your red lead of the voltmeter….start the car and you should see LESS THAN .1 or 100 mv’s on the voltmeter…if not comfortable testing find an auto electric shop in your area…can’t help you anymore than this.
Found this in that branch of harness. Patched it properly and cleared the code. Its stated off after multiple start-ups. Fuel gauge is working now too, which i think is coincidental
Found this in that branch of harness. Patched it properly and cleared the code. Its stated off after multiple start-ups. Fuel gauge is working now too, which i think is coincidental
P0113 and P2068
