i am currently working on a 2006 chevy aveo. I have an OBD II scan tool and accurately diagnosed that the car had a bad PCM and it was covered under the EPA warranty. While at the dealership they said the car needed a new map sensor which has also been replaced. The vehicle however is still having forced throttle limiting issues and will has only mild acceleration while the pedal is floored. Currently the Aveo is popping these 4 codes in order p0335 crank position sensor A circuit malfunction. p2138 throttle/pedal postion sensor switch "d"/"e" correlation. p2106 throttle actuator control system forced limited power. P0651 sensor reference voltage "b" circuit/ open. My thought was to replace the crank position sensor and the throttle body as it is drive by wire. Any help would be appreciated.
Country: United StatesMake: ChevroletModel: AveoYear: 2006Engine: 1.6 liter
New pcm-replaced by dealer
new map sensor-replaced as recommended by dealer
Cleaned throttle body assembly
Hello and Welcome to Just Answer. My name is XXXXX XXXXX X will try my best to assist you and your 100% satisfaction is my goal. I have been working on these vehicles for over 10 years so I am very familiar with this system and how they work. However, keep in mind, that I need some solid concrete facts/evidence/clues from you in order to give you a good answer about your vehicle. Please realize that all my answers are based solely on the info that you provide me with.If you clear the codes, which code comes back first?How does the engine idle?AMEDEE41036.8372662384
give a second and i will scan the vehicle again and see
after a couple start cycles after clearing all the codes it has pulled up the p0335 crankshaft position sensor a circuit malfunction
Ok.. and the crank sensor has not been replaced yet correct?
no with the multitude of codes i started with i have yet to replace that i didnt want to just throw parts at it with the remaining codes
Ok.. since this is the first code that comes back, we need to check the crank sensor and circuit. Check by ohming out the crank sensor. It should read 500 to 700 ohms. Also, check the wiring from the sensor going back to the computer. In addition, check for excessive air gap between the CKP sensor and the reluctor wheel.Also, check to be that the reluctor wheel that is improperly installed or has excessive free play
I have checked the ohms on the 3 prongs on the cps and am recieving 577 ohms. what is a reluctor wheel im unfamiliar with that can u explain that
That is the part that the sensor reads or picks up on. It reads this tone wheel when the engine is cranking over and the sensor generates a signal and sends it back to the computer.
i have pulled the cps and felt down in the hole it does not seem as if there is any freeplay in the there. the wiring in the harness has no obvious damage. should i replace the sensor for good measure. they are only 35.00. will the cps cause the car to run in limp mode and throw the other codes
NO.. the crank sensor should not cause the other codes in the computer. If the throttle body has not been replaced, this is a very strong possible cause. That and the throttle pedal position sensor would be your next step.
ASE MASTER TECHNICIAN ADVANCED LEVEL SPECIALIST