I have a 2006 Aveo. I recently had it in the shop due to a check engine light, they told me it was a gummed up throttle body, so they cleaned it and sent it on my way. Now my check engine light periodically comes on, maybe for a day or so at a time, and then off again for another day or so. When I scan it the code P2158 once again comes up. Do I need to replace the sensor, or the entire throttle body?
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Re: Code P2158/ Throttle Body
You most likley need to replace the whole unit. But without diagnosing it its all a guess. Look at it this way. You would of already spent a couple hundred at least to place one small part. If your wrong your now going to have to spend about $500 for the whole unit plus anothe diag possibly.
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If you can find your engines air filter housing, follow the larger intake hose toward the engine. Where the hose ends and is attached to the engine is your throttle body assembly. Look for the wire harness connector attached to the throttle body and you will see the throttle actuator module which controls the throttle plate.
What engine does it have ? Could have come with 5 different ones . If it has the 1.6 L engine . has electronic throttle control.
The throttle actuator control (TAC) system is used to improve emissions, fuel economy, and driveability. The TAC system eliminates the mechanical link between the accelerator pedal and the throttle plate. The TAC system eliminates the need for a cruise control module and idle air control motor. The following is a list of TAC system components:
• The accelerator pedal assembly includes the following components:
- The accelerator pedal
- The accelerator pedal position (APP) sensor 1
- The APP sensor 2
• The throttle body assembly includes the following components:
- The throttle position (TP) sensor 1
- The TP sensor 2
- The throttle actuator motor
- The throttle plate
• The engine control module (ECM
Just my opinion, but dealer is blowing smoke up there! Clean your throttle body. This is idler control code. It is VERY common for our TB's throttle body to gum up and get clogged with carbon, because we don't have a pcv system. Disconnect the battery, clean the throttle body, best done if you remove the throttle body. You can even re-use the plastic o-ring/gasket many times over. I find that using Seafoam to clean with plastic bristled brush is the best. Seafoam is sensor safe and cost about $9 a can. Look up on the TUBE, there are many videos there showing how to clean a Trailblazer/Envoy throttle body. Very easy and inexpensive. After that's done, clean that throttle body at least once a year. You'll get better gas mileage with it clean.
The best answer I can give you since I am not familiar with your throttle body itself, is to go to an online auto parts store, and look up the part. I found one on Oreillyauto.com for your car...it looks like a hose connects to one side of it and it has 2 mounting screws...then you can just look for that part on the throttle body itself. At least that would give you a visual of what to look for. then it's just about buying and replacing the part...make sense? hope so. good luck
should not have to pay for same part twice.take vechicle back to dealership tell them car not fixed you have same problem.let them know you payed them to fix car.same problem still exist.code p2135 problem could be the tps sensor or signal circuit to sensor wires and connector have a short or problem could be throttle body assembly damaged.
Easiest thing to do would be to follow the air intake tube to the throttle body.( big round rubber or plastic that goes from front area of car to engine and is usually held on with a clamp where it attaches to intake of throttle body) Right in that area, you will see your throttle linkage/cable etc, and where it pivots when gas pedal is pushed. Look opposite side of that housing and you should see the throttle position sensor.