TPS Error Code P0122
#1
03-31-2008, 01:08 PM
TPS Error Code P0122
Is it true that the TPS sensor is part of the throttle bell housing?
That part from Dodge is $504.00
Can the sensor be replaced, or do I need the whole unit?
The truck is running like crap. Under load it stutters like crazy. I don't think it would pull a decent grade by itself, let alone hauling anything.
Any info you have would be greatly appreciated.
Later, Mark
That part from Dodge is $504.00
Can the sensor be replaced, or do I need the whole unit?
The truck is running like crap. Under load it stutters like crazy. I don't think it would pull a decent grade by itself, let alone hauling anything.
Any info you have would be greatly appreciated.
Later, Mark
#3
03-31-2008, 01:49 PM
yes it is
you can try to reset your APPS sensor by disconnecting the battery cables from both batteries for 30 minutes and then hook them back up, turn the ignition on and do not crank, press the accelerator pedal to the floor slowly, then bring it back to the up or idle position just as slow as you pressed it down. turn the ignition off and then restart the truck and try that out. that may not work well so here are some instructions on how to adjust the sensor itself posted by DieselMinded
if that dosen't work you can always follow this troubleshooting guide.
SYMPTOM
P0122-ACCELERATOR PEDAL POSITION SENSOR SIGNAL VOLTAGE TOO LOW
WHEN MONITORED
During engine running operation.
SET CONDITION
Low voltage detected at APPS signal circuit or low voltage detected between the Engine Control Module (ECM) and the Power Train Control Module (PCM) .
POSSIBLE CAUSES
5 Volt supply at APPS shorted to ECM sensor ground
APPS signal circuit shorted to ECM sensor ground
5 volt supply to ground
APPS signal circuit shorted to ground
APPS signal circuit open to ECM
PCM (APPS) short to ecm sensor ground
ECM (APPS) to PCM (APPS) circuit shorted
ECM (APPS) to PCM (APPS) circuit open
Short to ECM sensor ground.
Accelerator Pedal Position Sensor (APPS)
Engine control module
Powertrain control module
that being said here is a chart to help out with trouble shooting
Tests 1 - 2.pdf
Tests 3 - 7.pdf
Tests 8 - 12.pdf
you can try to reset your APPS sensor by disconnecting the battery cables from both batteries for 30 minutes and then hook them back up, turn the ignition on and do not crank, press the accelerator pedal to the floor slowly, then bring it back to the up or idle position just as slow as you pressed it down. turn the ignition off and then restart the truck and try that out. that may not work well so here are some instructions on how to adjust the sensor itself posted by DieselMinded
Originally Posted by DieselMinded
This is different than resetting it. I did it to mine today and it made a nice difference. Boost comes up faster and smoke is down. You have to measure the voltage that the APPS is putting out then compare that to the voltage that it's supposed to be set at. For example. My apps was putting out .450 volts and it was supposed to be putting out .584 volts. I went and adjusted it and now I'm putting out .580 volts. It's not a major difference but it is nice. I've only put maybe 5 miles on it so far but come wednesday I'll be doing 500 miles a week so I'll give yall a better idea on how it drives.
Instructions:
Tools: Digital Volt Meter, T-20 Torx bit, #1 phillips, 10mm socket
With the key on, engine off you need to probe the APPS wire to see where the voltage is currently set at.
The best location to probe the wire is on the PCM (Power Control Module) which is located on the passenger firewall behind the air intake.
* You want the C1 connector, this is the connector closest to the engine
* You want the orange wire with a dark blue tracer which is pin #23
* Voltage should be somewhere around 0.5 volts,
* At this point the voltage reading does not matter, it just has to be accurately written down for later reference
TURN THE IGNITION OFF ON THE TRUCK
Remove the black plastic cover off of your APPS. There are two plastic screws. One on the top and one on the front facing the radiator. It takes a little prying to pull it off.
Undo the 6-10mm bolts that hold the bracketru in place but DO NOT REMOVE THE CABLES!!
You will notice the APPS is on the back of the bracketry that you just removed, it is held in place by 2-T20 torx bit screws. These screws have a little bit of locktite on them so make sure you have a good socket and gently give a little tap with a hammer before attempting to loosen. Be very careful because these screws strip VERY easily and you only get one shot at them (VERY VERY VERY IMPORTANT; They are VERY tight).
On the APPS you will find a white tag that gives you the information on what the APPS voltage should be.
* After loosening the screws (do not remove) you can rotate the APPS clockwise or counter clockwise to get the adjustment (towards the front of the truck increases voltage and towards the rear of the truck decreases voltage)
* The reading you took at the beginning of the process on pin #23 should match the white tag on your APPS. If it doesn't the adjust accordingly.
Instructions:
Tools: Digital Volt Meter, T-20 Torx bit, #1 phillips, 10mm socket
With the key on, engine off you need to probe the APPS wire to see where the voltage is currently set at.
The best location to probe the wire is on the PCM (Power Control Module) which is located on the passenger firewall behind the air intake.
* You want the C1 connector, this is the connector closest to the engine
* You want the orange wire with a dark blue tracer which is pin #23
* Voltage should be somewhere around 0.5 volts,
* At this point the voltage reading does not matter, it just has to be accurately written down for later reference
TURN THE IGNITION OFF ON THE TRUCK
Remove the black plastic cover off of your APPS. There are two plastic screws. One on the top and one on the front facing the radiator. It takes a little prying to pull it off.
Undo the 6-10mm bolts that hold the bracketru in place but DO NOT REMOVE THE CABLES!!
You will notice the APPS is on the back of the bracketry that you just removed, it is held in place by 2-T20 torx bit screws. These screws have a little bit of locktite on them so make sure you have a good socket and gently give a little tap with a hammer before attempting to loosen. Be very careful because these screws strip VERY easily and you only get one shot at them (VERY VERY VERY IMPORTANT; They are VERY tight).
On the APPS you will find a white tag that gives you the information on what the APPS voltage should be.
* After loosening the screws (do not remove) you can rotate the APPS clockwise or counter clockwise to get the adjustment (towards the front of the truck increases voltage and towards the rear of the truck decreases voltage)
* The reading you took at the beginning of the process on pin #23 should match the white tag on your APPS. If it doesn't the adjust accordingly.
SYMPTOM
P0122-ACCELERATOR PEDAL POSITION SENSOR SIGNAL VOLTAGE TOO LOW
WHEN MONITORED
During engine running operation.
SET CONDITION
Low voltage detected at APPS signal circuit or low voltage detected between the Engine Control Module (ECM) and the Power Train Control Module (PCM) .
POSSIBLE CAUSES
5 Volt supply at APPS shorted to ECM sensor ground
APPS signal circuit shorted to ECM sensor ground
5 volt supply to ground
APPS signal circuit shorted to ground
APPS signal circuit open to ECM
PCM (APPS) short to ecm sensor ground
ECM (APPS) to PCM (APPS) circuit shorted
ECM (APPS) to PCM (APPS) circuit open
Short to ECM sensor ground.
Accelerator Pedal Position Sensor (APPS)
Engine control module
Powertrain control module
that being said here is a chart to help out with trouble shooting
Tests 1 - 2.pdf
Tests 3 - 7.pdf
Tests 8 - 12.pdf
Last edited by Benjamin; 12-01-2009 at 03:17 PM.
#5
03-31-2008, 01:55 PM
The following users liked this post:
Nitelord (03-31-2008)
#8
04-14-2008, 09:37 PM
#9
12-31-2009, 07:06 PM
hi im having problems with my truck i think it is the tps but it has .275 volts this thing sux bad . tranny wont change from first to second or second th third HELP please
---AutoMerged DoublePost---
its a 01 2500 dodge cummins
---AutoMerged DoublePost---
its a 01 2500 dodge cummins
Last edited by k7racing; 12-31-2009 at 07:06 PM. Reason: Automerged Doublepost
#10
12-31-2009, 07:22 PM
