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2003 Cadillac CTS Repair Question


Topics covered: Sensor, Vacuum leak, Performance.
Mileage: 110,000 miles.

Asked on December 4, 2011

TC lumagny

Hello
I turned on my CTS 2003 at morning I found the light TC turned on. I tried to move the selector it was blocked on P. I just turned the ignition and selected Neutral and turned on the car it worked. I connected the scaner, it gave the stop lamps are broken. I changed the stop lamps and cleared the memory, the car worked normally for two hours and turned off alone. I turned it on, the accelerator pedal didn't work. I turned off and turned on the car it worked badly for 10 minutes and stopped completly. I waited 2 hours and turned on the car it works normally. could any-one explain me what happen?
Avatar Asked by ranyrizk

Answer

Replied on December 4, 2011

my scaner gave the following codes:
P0058
P0161
P0638
P0638
P2101
P2176
hope that helps

Tiny Response from ranyrizk
6 questions asked
Replied on December 4, 2011

That many codes usually means a malfunctiong ECU.

Tiny Answered by rivermikerat (expert)
5,494 answers provided
Replied on December 4, 2011

it sounds like a ground problem, how are your battery cables?are they clean?especially the ground.

Tiny Answered by Dr Loot (expert)
2,178 answers provided

Replied on December 4, 2011

P0058: Heated O2 sensor circuit high, bank 2 sensor 2.
P0161: Heated O2 sensor performance, Bank2
P0638: Throttle actuator control range/performance.
P2101: Minimum throttle position not detected.
P2176Minimum throttle position not detected.

Sounds like your throttle position sensor and second O2 sensor on bank 2 have gone bad.

Tiny Answered by rivermikerat (expert)
5,494 answers provided
Replied on December 4, 2011

possible vacuum leak

Tiny Answered by Dr Loot (expert)
2,178 answers provided
Replied on December 5, 2011

I can see vacuum leak if the only code)s_ pertained to the O2 sensor, but the 3 TPS fault codes don't lead me to think vacuum leak, since it's electronic as is the throttle itself, I believe.

Tiny Answered by rivermikerat (expert)
5,494 answers provided