Engine Code P0122
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Joined: Nov 2007
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RE: Engine Code P0122
Hey I did a quick look and found a little info on it for you.-Rob
THROTTLE POSITION TROUBLE SENSOR (TPS) CODES
These include P0120, P01210, P0122, P0123, P0124 P0222, P0223, P0224, P0225, P0226, P0227, P0228 & P0229, and can be set if the TPS sensor readings are too high or too low (out of range), if the signal is lost, or if the signal does not correspond to the MAP sensor's readings.
The TPS sensor monitors the position of the throttle so the computer can add more fuel when the engine is accelerating or under load. The computer may also need to know when the throttle is at idle or wide open to control other functions.
A bad TPS can cause driveability problems such as hesitation. The sensor's resistance changes as the throttle moves, causing the return voltage signal to vary. Look for a change in the voltage output as the throttle opens and closes. No change or skips in the output would indicate a faulty TPS sensor.
Also note: the idle voltage is adjustable on some TPS sensors and must be set within specifications for accurate operation. If the voltage adjustment is not within specifications, it can adversely affect performance and throttle response.
THROTTLE POSITION TROUBLE SENSOR (TPS) CODES
These include P0120, P01210, P0122, P0123, P0124 P0222, P0223, P0224, P0225, P0226, P0227, P0228 & P0229, and can be set if the TPS sensor readings are too high or too low (out of range), if the signal is lost, or if the signal does not correspond to the MAP sensor's readings.
The TPS sensor monitors the position of the throttle so the computer can add more fuel when the engine is accelerating or under load. The computer may also need to know when the throttle is at idle or wide open to control other functions.
A bad TPS can cause driveability problems such as hesitation. The sensor's resistance changes as the throttle moves, causing the return voltage signal to vary. Look for a change in the voltage output as the throttle opens and closes. No change or skips in the output would indicate a faulty TPS sensor.
Also note: the idle voltage is adjustable on some TPS sensors and must be set within specifications for accurate operation. If the voltage adjustment is not within specifications, it can adversely affect performance and throttle response.
Registered User
Joined: Mar 2008
Posts: 24
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From:
RE: Engine Code P0122
How did you make out with this?
Check the wiring & connections leading to the TPS. Check the voltage and see if needs adjustment or replacement... More P0122 help here -- http://www.obd-codes.com/p0122
Check the wiring & connections leading to the TPS. Check the voltage and see if needs adjustment or replacement... More P0122 help here -- http://www.obd-codes.com/p0122
Charger Moderator
Joined: Apr 2006
Posts: 3,109
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From: Allen TX
RE: Engine Code P0122
Some Nitrous users tap the TSP for a signal for the management unit that tells the system when to spray. As the gas peddle is depressed the TSP signal wire voltage goes up from 0 to .5 volts atWOT.
