|12-07-2004, 01:32 PM||#1|
Join Date: Nov 2003
Location: Rochester, NYVehicle:
2000 Impreza 2.5RS
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.
Borla header, apexi n1 cat-back.
Cobb CAI, JUN 9lb flywheel
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|12-07-2004, 02:23 PM||#2|
Join Date: Oct 2001
Location: Rocklin, CaliforniaVehicle:
2002 2.5 RS
Black as Midnight!!!
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.
|12-27-2004, 01:12 PM||#6|
Trust no one
Join Date: Oct 2001
15 WRX/05 GTO
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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