P0121 code

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Old 10-17-15, 02:11 AM
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P0121 code

2008 Silverado small V-8

Looked it up , accelerator petal position sensor . Cleared the code , has not come back .

Also read one thread , it may also mean the electric throttle system may need cleaning ? Any one know more .

If the code comes back , I may try unplugging and plugging the connector back into the APPS .

Last ditch , buy an new part and replace it . Company truck , boss will pay for the part . I do not mind installing it .

We had another truck limp home ( limp home mode ) for about 60 miles . Had the electric throttle system replaced & it has not given any more problems since .

I am not at all sure I like this fly by wire throttle system . :-(

Expensive solution to a problem that did not exist .

God bless
Wyr
 
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Old 10-17-15, 09:18 AM
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Wifey's current car (Camry) is our first with gas-by-wire; like you I think the jury is still out and, really, when did anyone EVER have a problem with a throttle cable? I mean, my wrecker is pushing 680,000 miles and 20 years on factory cable. Can't imagine it's cheaper to produce/install at the factory which generally drives that kind of design/engineering decisions.
 
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Old 10-17-15, 10:49 AM
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OBD-II Trouble Code: P0121 Throttle Position Sensor/Switch A Circuit Range/Performance Problem

Another site mentions:

Common Problems That Trigger the P0121 Code

Defective Throttle/Pedal Position Sensor or Switch
Dirty or carbon-filled Throttle Bore
Torn or jammed floor mats
Faulty or corroded Throttle/Pedal Position Sensor/Switch wiring or connections

Don't make the mistake of replacing a perfectly good part just because of a code. You can test it with a multimeter. If the code doesn't come back, it may have just been a temporary problem.
 
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Old 10-18-15, 01:46 AM
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Dirty or carbon-filled Throttle Bore

Seems like some one sells a a cleaner in a spray can ?

Suggestions , please ?

God bless
wyr
 
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Old 10-18-15, 07:06 AM
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I've used CRC throttle body cleaner... works fine.
 
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Old 10-18-15, 10:11 AM
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Pretty much any throttle body cleaner and a toothbrush. CRC sleeper mentions is good.
 
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