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Old 12-07-2004, 01:32 PM   #1
nytoy
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Default Causes of CEL codes P0122 and P1133

P0122 Throttle/Petal Position Sensor/Switch A Circuit Low Input

P1133 Front oxygen sensor heater circuit high input

I've searched, nothing specifically to help me on the TPS error.

What should I start doing to fix these? Previous owner said he replaced both 02 sensors and the 1133 code was off for a week before it came back on.

the car runs and drives good, it does buck a little around 3k rpm, and smells like unburnt fuel, plus getting 23mpg on the expressway.

mods:
Borla header, apexi n1 cat-back.

Cobb CAI, JUN 9lb flywheel

Any ideas?
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Old 12-07-2004, 02:23 PM   #2
DDMan
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ya...definately sounds like somethign is going on with your O2 Sensor.

Did the prev. owner replace the front or the rear O2 Sensor? I dunno about the first TPS code though.
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Old 12-08-2004, 11:30 AM   #3
nytoy
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anyone else know the TPS?
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Old 12-20-2004, 03:44 PM   #4
nytoy
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tttt
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Old 12-27-2004, 01:02 PM   #5
nytoy
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help
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Old 12-27-2004, 01:12 PM   #6
Mulder
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Probably a bad TPS sensor. You can try unplugging the sensor (located on the throttle body) and plugging it back in, on the chance that it's just a bad connection. If that doesn't do it there is probably a "dead spot" in the TPS at the idle or just off-idle position where it sees the most action, that is how they usually fail. The TPS can be tested with an ohmeter or by connecting a scanner to the car that reads live data, and watching the readings (resistance or throttle %) as it is moved through its range. The readings should change in a linear fashion with no jumps or dropouts.
The 02 code could be a bad heater in the 02 itself, but if you've already replaced the sensor with a new one it could also be a wiring problem. Sometimes the wiring harness for the sensor can be damaged by heat if it gets too close to the exhaust or actually comes in contact with it.
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