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DTC po121 2002 cabrio causes

Trying to diagnose DTC po121 only get throttle position sensor pedal interupt on scanner

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  • Contributor
  • 34 Answers

Check wirings first

Posted on Jun 15, 2014

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Posted on Jan 02, 2017

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localwonder
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SOURCE: throttle Pedal Position Sensor Switch A

its just a sensor. you do not have to replace the entire throttle body.

Posted on Mar 16, 2009

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SOURCE: DTC - PO340, PO325

My Nissan micro 2004 model just stopped in the middle of the road one day then the engine management light came on, anyway took it to my local garage TWK Thomas who said it was a cam shaft sensor problem. OK so sensor was put on, engine management light went off for two days only. So went back to the garage they said that another sensor should be fitted on the opposite side. And then the problem should be rectified, but i had given the £160 for this problem to be fixed the first time. I decided it was time to take it to another garage Nis Tec they put it on the computer and a code po340 came up would this mean another sensor or the cam chain has stretched please help. ...claire

Posted on Jul 22, 2009

  • 62 Answers

SOURCE: Throttle/Pedal Position Sensor/Switch B Circuit Range Performance

there is no adjustment on these tps's it's a drive by wire system. If you don't know the vehicle, dont post!
there's 2 sensors contained in the pedal sensor, and one on the throttle plate shaft, more often than not, it's the pedal sensor, and if you replaced that, it's the other one or a loose connection. did you reset the computer after replacing the pedal?

Posted on Feb 09, 2010

  • 1 Answer

SOURCE: 95 f250 7.3 is throttle position sensor on the pedal

i have a f350 ps and it starts and idles but i have no throttle nothing happens when i push the pedal and the check engine light comes on

Posted on Sep 30, 2010

jturcotte
  • 8273 Answers

SOURCE: I have a 2007 Chevy

If it is a code P0226 I would not consider it a safety issue.


Throttle position (TP) sensor C/accelerator pedal

position (APP) sensor ? - range/performance problem


Possible Causes: Accelerator cable adjustment, TP/APP sensor

Throttle position (TP) switch C/accelerator pedal position

(APP) switch ? - range/performance problem
Accelerator cable adjustment, TP/APP switch

This might only be an adjustment issue--make sure the throttle cable isn't so tight that the throttle cannot fully close.
If the cable is OK, it is probably the accelerator position sensor under the pedal.
There are procedures for testing the unit that I will paste below if you care to try them.

If you just want a shop to fix it, the part is about $50 and labor should only be 30 minutes.


Operation The sensor is made up of the two individual sensors within a single housing. Each sensor has a unique functionality to determine pedal position. The APP system along with the Powertrain Control Module (PCM) is used to calculate and control the amount of acceleration and deceleration through fuel injector control.


Removal & Installation

  1. Remove the driver-s side knee bolster.
  2. Push down on the small tab and disengage the electrical connector.
  3. Remove the pedal bolts and remove the pedal and sensor assembly.
  4. Installation is the reverse of removal.

    5bcaece.gif

Fig. APP sensor mounting
Testing

  1. Install a 3 amp fused jumper wire between the 5-volt reference terminal of the APP sensor and 5 volts. Install a jumper wire between the low reference terminal and a ground.
  2. Sweep the sensor through the entire range while monitoring the voltage between the signal terminal and the low reference terminal with a digital multimeter. The voltage should vary between 0.30-4.98 volts without any spikes or dropouts.
  3. If the voltage is not within the specified range or is erratic, replace the accelerator pedal assembly.

Posted on Oct 06, 2010

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ITEM 98568 P2138 $07E8 1/2 GENERIC THROTTLE/PEDAL POSITION SENSOR SWTCH D/E VOLTAGE CORELATION


You need to understand the causes of this fault, it is not always the throttle pedal sensor, it can also be wiring or the throttle valve sensor. Read about it at the link. P2138 Throttle Pedal Pos Sensor Voltage Correlation DTC

Jun 20, 2017 | Cars & Trucks

2 Answers

In my 2005 Pontiac Montana the OBD code reader reads code PO108 - Manifold absolute pressure sensor circuit, high input. What can cause this.


The PCM detects that the MAP sensor voltage is more than 4.3 volts for 3 seconds.
This DTC may set due to poor idle characteristics. A possible cause may be uncontrolled fueling due to an open or high resistance in the HO2S 1 low signal circuit. Before replacing any component, ensure that this condition does not exist.
2
Turn ON the ignition, with the engine OFF.
Monitor the DTC information with the scan tool.
Is DTC P0641 also set?
--
YES - Go to Diagnostic Trouble Code (DTC) List - Vehicle
NO - Go to Step 3
3
Observe the throttle position (TP) sensor parameter with the scan tool.
Press the accelerator pedal slowly until the throttle is in the wide open position.
Release the accelerator pedal slowly until the throttle is returned to the closed position.
Repeat this procedure several times.
Does the TP sensor parameter increase steadily to more than the first specified value, and then decrease steadily returning to less than the second specified value?
98%
1%
YES - Go to Step 4
NO _ Go to DTC P0121
4
Start the engine.
Observe the MAP sensor parameter with a scan tool.
Is the voltage more than the specified value?
4.3 V
YES - Go to Step 6
NO - Go to Step 5

Jan 27, 2017 | 2005 Pontiac Montana

1 Answer

Pontiac grand prix 2007 car shutting off, with Start disabled throttle control module.


It doesn't say module , Starting Disabled Due To Electronic Throttle Control !
The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions:
• Accelerator pedal position (APP) sensing
• Throttle positioning to meet driver and engine demands
• Throttle position sensing
• Internal diagnostics
• Cruise control functions
• Manage TAC electrical power consumption
The TAC system includes the following components:
• The APP sensors
• The throttle body assembly
• The powertrain control module (PCM)
Normal Mode
During the operation of the throttle actuator control (TAC) system, several modes or functions are considered normal. The following modes may be entered during normal operation:
• Minimum pedal value--At key-up, the powertrain control module (PCM) updates the learned minimum pedal value.
• Minimum throttle position (TP) values--At key-up, the PCM updates the learned minimum throttle position value. In order to learn the minimum throttle position value, the throttle blade is moved to the closed position.
• Ice break mode--If the throttle is not able to reach a predetermined minimum throttle position, the ice break mode is entered. During the ice break mode, the PCM commands the maximum pulse width several times to the throttle actuator motor in the closing direction.
• Battery saver mode--After a predetermined time without engine RPM, the PCM commands the battery saver mode. During the battery saver mode, the TAC module removes the voltage from the motor control circuits, which removes the current draw used to maintain the idle position and allows the throttle to return to the spring loaded default position.
Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The PCM will continue to use the accelerator pedal for throttle control, however the vehicle acceleration is limited.
• Limited throttle mode--The PCM will continue to use the accelerator pedal for throttle control however the maximum throttle opening is limited.
• Throttle default mode--The PCM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The PCM will perform the following actions:
- Limit engine speed to idle by positioning the throttle, or by controlling the fuel and spark if the throttle is turned off.
- Ignore the accelerator pedal input.
• Engine shutdown mode--The PCM will disable fuel and de-energize the throttle actuator.

DTC P2101
DTC P2107
DTC P2108
DTC P2119
DTC P2120
DTC P2125
DTC P2135
DTC P2138 You need to see which of these codes

Nov 16, 2016 | 2007 Pontiac Grand Prix

1 Answer

Dtc p0121 throttle position (tp) sensor performance


code p 0121 has to answers
1--refers to throttle position (TP) sensor/accelerator pedal position sensor A--range /performance problem====causes --accelerator cable adjustment--TP/APP sensor ---wiring
The second reference is the same and the causes are--accelerator cable adjustment--TP/APP switch
(APP is accelerator pedal position)

Aug 30, 2016 | Cars & Trucks

1 Answer

05 mustang gt codes po 2104 and 2112 replace tcm and tps


P2104 - Throttle Actuator Control (TAC) System - Forced Idle Description: The TAC system is in the failure mode effects management (FMEM) mode of forced idle. Possible Causes:
  • Open or short in multiple accelerator pedal position (APP) sensor circuits.
  • Damaged APP sensor.
  • Damaged powertrain control module (PCM).
Diagnostic Aids: This DTC is an informational DTC and can be set in combination with a number of other DTCs which are causing the FMEM. Diagnose other DTCs first. Application Key On Engine Off Key On Engine Running Continuous Memory All

P2112 - Throttle Actuator Control (TAC) System - Stuck Closed. Description: This powertrain control module (PCM) fault status indicates the throttle plate is at a lower angle than commanded. Possible Causes:
  • Binding throttle body, stuck closed.
  • Damaged PCM.
Diagnostic Aids: Application Key On Engine Off Key On Engine Running Continuous Memory All GO to DV1 Are you familiar with electronic throttle control ? You have a dc electric motor on the throttle body an at the gas pedal there are APP pedal position sensors that send voltage signals to the PCM which in turn controls the electric motor opening an closing the throttle ! By what this P02112 states the throttle plate is binding , which means it could be bad or just needs to be cleaned ! You will need to disconnect the electrical connector an see if it is binding by pushing it with finger or thumb . which is ever easiest !
GO to QE1

Apr 08, 2015 | 2005 Ford Mustang GT

2 Answers

Car not taking the gas,code p2122 and p2127


check your aps sensor,accelarator position sensor if its bad and make sure all connector and wire from this sensor to ecu is good,.

Mar 09, 2015 | 2004 Kia Amanti

1 Answer

Have 2006 gmc canyon having trouble with it staying on.3.5 engine starts up,stays on a few seconds then shuts off shows reduced power on panel.won't crank over .have to wait a few minutes then it


REDUCED POWER
Refer to:
• Powertrain Control Module Description for the 2.8L engine
• Powertrain Control Module Description for the 3.5L engine

Throttle Actuator Control (TAC) System
Throttle Actuator Control (TAC) Overview
The throttle actuator control (TAC) system uses vehicle electronics and components to calculate and control the position of the throttle blade. This eliminates the need for a mechanical cable attachment from the accelerator pedal to the throttle body. This system also performs the cruise control functions as well.
The TAC system components include, but are not limited to the following:
• The accelerator pedal position (APP) sensors
• The throttle body
• The powertrain control module (PCM)
Each of these components interface together to ensure accurate calculations and control of the throttle position.

Accelerator Pedal Position (APP) Sensor
The accelerator pedal position (APP) sensor is mounted on the accelerator pedal assembly. The APP is 2 individual APP sensors within one housing. There are 2 separate signal, low reference, and 5-volt reference circuits. APP sensor 1 voltage increases as the accelerator pedal is depressed. APP sensor 2 voltage decreases as the accelerator pedal is depressed.
Throttle Body Assembly
The throttle body for the throttle actuator control (TAC) system is similar to a conventional throttle body with several exceptions. One exception being the use of a motor to control the throttle position instead of a mechanical cable. Another exception is the throttle position (TP) sensor. The TP sensor is mounted in the throttle body assembly. The TP sensor is 2 individual TP sensors within the throttle body assembly. Two separate signals, low reference, and 5-volt reference circuits are used to connect the TP sensors and the powertrain control module (PCM). TP sensor 2 signal voltage increases as the throttle opens. TP sensor 1 signal voltage decreases as the throttle opens.

Reduced Engine Power Mode
When the PCM detects a problem with the throttle actuator control (TAC) system the PCM enters one of the following Reduced Engine Power Modes:
• Acceleration Limiting--The control module will continue to use the accelerator pedal for throttle control, however the vehicle acceleration is limited.
• Limited Throttle Mode--The control module will continue to use the accelerator pedal for throttle control, however the maximum throttle opening is limited.
• Throttle Default Mode--The control module will turn OFF the throttle actuator.
• Forced Idle Mode--The control module will perform the following actions:
- Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned OFF.
- Ignore accelerator pedal input.
• Engine Shutdown Mode--The control module will disable fuel and de-energize the throttle actuator.

Have you had it checked for DTC'S - diagnostic trouble codes ?

DTC P2176
The commanded throttle position (TP) is compared to the actual TP. Both values should be within a calibrated range of each other. The powertrain control module (PCM) continuously monitors the commanded and actual TPs. If the values are greater than the calibrated range, DTC P2176 sets.
--------------------------------------------------------------------------------
DTC P2138
The accelerator pedal position (APP) sensors 1 and 2 are located within the accelerator pedal assembly. Each sensor has the following circuits:
• A 5-volt reference circuit
• A low reference circuit
• A signal circuit
This provides the powertrain control module (PCM) with a signal voltage proportional to accelerator pedal movement. The APP sensor 1 signal voltage at rest position is near the low reference and increases as the pedal is actuated. The APP sensor 2 signal voltage at rest position is near the 5-volt reference and decreases as the pedal is actuated.
DTC P2135
The throttle actuator control (TAC) assembly has 2 throttle position (TP) sensors mounted within the assembly. The powertrain control module (PCM) provides individual signal, ground, and 5-volt reference circuits to each sensor. Both sensors operate within a voltage range between 0.35-4.65 volts. When the throttle is opened from 0-100 percent, one sensor signal voltage increases while the other decreases. The signal circuit for TP sensor 1 is referenced to ground, and the signal circuit for TP sensor 2 is pulled up to 5 volts within the PCM.
DTC P2128
DTC P2127
DTC P2125
DTC P2123

Drive by Wire Function and diagnostics by Wells

May 25, 2017 | 2006 GMC Canyon

2 Answers

I have a 2000 focus with a p1120 code what can I do to start this repair.


Diagnostic Trouble Code (DTC) P1120 indicates that the Throttle Position Sensor (TPS) closed throttle position is below the range of 3.4 percent (0.17 volts). Possible causes for this DTC are:

· Damaged wiring harness or connectors

· Open or shorted Reference Voltage (VREF) circuit

· Faulty TPS

· Faulty Powertrain Control Module (PCM)

The methods/steps for diagnosing this code depend on how the code was stored and retrieved.

This code can be a Key On Engine Off (KOEO), Key On Engine Running (KOER), or a Continuous Memory code. To properly diagnose the cause of the problem a scanner must be obtained that has the ability to read each of these as well as the capability of reading live engine data from the PCM.

Direct voltage readings should be taken at the TPS connector and compared to the live data at the PCM. This will eliminate the possibility of a faulty PCM. The VREF and Signal Return circuits must be verified between the TPS and the PCM. Also the Sensor Ground circuit must be verified between the TPS connector and battery ground.

Feb 23, 2011 | 2000 Ford Focus

1 Answer

Just replaced the fuel pump, now we get the code P1544, Mfg. Specific DTC, see service manual, as well as P0121, Throttle pedal position/sensor CKT Ring perform What now??


are you getting fuel now,have you checked fuel pressure?dtc just means it wasn't detected clear that code out,your tps you might need to check voltage,should be between .o5ohms.










TIM

Dec 12, 2010 | 2001 Volkswagen Cabrio

2 Answers

Code po506 shows up how do i fix it


This P0506 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle. In this case, the P0506 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is lower than the desired (pre-programmed) RPM.
Causes:
A P0506 DTC trouble code may be caused by one or more of the following:
· A vacuum leak
· An air restriction in the intake
·
· air path or exhaust
· A faulty positive crankcase ventilation (PCV) valve
· Damaged/failed/dirty throttle body
· Internal engine problem
· Failed PCM

This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect for vacuum leaks, restrictions, and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns

Nov 21, 2009 | 2004 GMC Canyon

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