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post #1 of 10 (permalink) Old 10-21-2013, 08:06 AM Thread Starter
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Throttle Position Sensor

I have a 2007 Cobalt with 155,000 miles. The CEL came on and when I had the codes checked at AutoZone it comes back as Throttle Position Sensor problem. Can I change just the sensor or do I need to change the whole throttle body?
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post #2 of 10 (permalink) Old 10-21-2013, 08:45 AM
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Whole throttle body. Amazon has the best prices for sc delco throttle bodies. Just make sure to match up how many pins there are

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Last edited by Coby7; 10-21-2013 at 09:06 AM.
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post #3 of 10 (permalink) Old 10-21-2013, 08:56 AM Thread Starter
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I have seen just the sensor online. Can it not be changed seperatly?
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post #4 of 10 (permalink) Old 10-21-2013, 09:00 AM
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Trust me, whatever sensor you're finding is not correct. The throttle bodies have integrated sensors unlike most cable driven throttle bodies.

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post #5 of 10 (permalink) Old 10-21-2013, 09:10 AM
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If I had all the specialty tools needed to change just the sensors, I would still buy a complete throttle body. Have you read the replacement procedure to replace the sensors. It's rediculous. Believe me if you don't have the jig to do this and the computer to calibrate it after replacement do not attempt to change just the sensors.

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post #6 of 10 (permalink) Old 10-21-2013, 09:24 AM
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I know you've got the TPS code...but have you attempted cleaning the plug/pins and the TB itself...most of the time that's either free or whatever a can of cleaner costs and a towel you don't care about.

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post #7 of 10 (permalink) Old 10-21-2013, 09:26 AM
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Yea sometimes its just a loose wire and it will throw the code and go to limp mode. Happens to me all the time

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post #8 of 10 (permalink) Old 10-21-2013, 09:41 AM
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This was too funny, when I looked it up on the GM server this is what was written.

Throttle Position Sensor Replacement. ( followed immediately by)

Throttle Body Replacement Procedure
Removal Procedure
Notice: Do not use solvent of any type when cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as damage to the gasket surfaces and throttle body assembly may result.

Use care in cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as sharp tools may damage the gasket surfaces.


Notice: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.

Important: DO NOT prop open the throttle blade with the ignition key in the ON position as it may set a diagnostic trouble code (DTC).





Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Resonator Replacement .
Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
Disconnect the throttle actuator control (TAC) electrical connector (1).



Remove the throttle body bolts.
Remove the throttle body .
Inspect the throttle body gasket, and replace if necessary.
Installation Procedure




Install the throttle body.
Notice: Refer to Fastener Notice in the Preface section.

Install the throttle body bolts.
Tighten
Tighten the bolts to 10 Nm (89 lb in).





Connect the TAC electrical connector (1).
Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .
Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Resonator Replacement .

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post #9 of 10 (permalink) Old 10-21-2013, 09:54 AM Thread Starter
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Yes, when I had Autozone do a code scan, it came back with a code. I believe it was P0121. I'll try checking and cleaning the connections. Would they come loose or get dirty if they have never been worked on before?
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post #10 of 10 (permalink) Old 10-21-2013, 10:15 AM
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Yea. These things happen sometimes

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