Throttle position sensor

What is the DTC - diagnostic trouble code ? No code tells you a part is bad . Diagnostic testing procedures are given for each code the vehicle can set . Your vehicle can set numerous code's for the electronic throttle control an not one of them tell's you out right to replace the throttle body or the APP sensors . Looking at factory service repair info for the code an doing diagnostic testing befor replacing any parts should be done.

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 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 components include the following:
• The accelerator pedal position (APP) sensors
• The throttle body assembly
• The throttle actuator control module
• The powertrain control module (PCM)

Accelerator Pedal Position (APP) Sensor
The accelerator pedal assembly contains 2 individual APP sensors within the assembly. The accelerator pedal position (APP) sensors 1 and 2 potentiometer type sensors each with 3 circuits:
• A 5-volt reference circuit
• A low reference circuit
• A signal circuit
The APP sensors are used to determine the pedal angle. The control module provides each APP sensor a 5-volt reference circuit and a low reference circuit. The APP sensors then provide the control module with signal voltage proportional to pedal movement. APP sensor 1 signal voltage is low at the rest position and increases as the accelerator pedal is applied. APP sensor 2 signal voltage is high at the rest position and decreases as the accelerator is applied.

Throttle Body Assembly
The throttle body assembly consists of the throttle body, the throttle position (TP) sensors, and the throttle actuator motor. The throttle body functions similar to a similar to a conventional throttle body with the following exceptions:
• An electric motor opens and closes the throttle valve.
• The throttle blade is spring loaded in both directions and the default position is slightly open.
• There are 2 individual TP sensors within the throttle body assembly.
The TP sensors 1 and 2 are potentiometer type sensors each with 3 circuits:
• A 5-volt reference circuit
• A low reference circuit
• A signal circuit
The TP sensors are used to determine the throttle plate angle. The control module provides each TP sensor a 5-volt reference circuit and a low reference circuit. The TP sensors then provide the control module with signal voltage proportional to throttle plate movement. Both TP sensor signal voltages are low at closed throttle and increase as the throttle opens.

Your best bet , take it to a qualified repair shop.

Throttle Position Sensor is located on the Throttle Body for the EFI intake. Mark position of old unit and try to match when installing new unit. Should be taken to garage to get proper adjustment of "TPS" at idle if your unsure of yourself.

code p 0700 refers to transmission control system/MIL---malfunction===causes ---wiring ---TCM
code p 0123 refers to throttle position sensor(TP) sensor A, accelerator pedal position sensor A -- high input===causes ---wiring short to positive --- TP/APP sensor ---ECM
also has low input==causes --- wiring short to ground TP/APP sensor and ECM
code p 1698 refers to --no CCD message received from PCM check all wiring harnesses around the radiator and check all connections
refit the thermostat as it is an important part of controlling coolant flow to remove heat from the water by the fins

code p 0101 refers to mass air flow (MAF) sensor /volume air flow(VAF) sensor --range /performance problem===causes ---intake leak/blockage ---MAF/VAF sensor
code p 0201 refers to injector 1--circuit malfunction===causes wiring---injector---ECM
code p 0224 refers to throttle position(TP) sensor B/ accelerator pedal position (APP) sensor B--circuit malfunction===causes --wiring ---poor connections --TP/APP sensor ---ECM

code p 0107 refers to manifold absolute pressure (MAP) sensor/ barometric pressure (BARO) sensor--low input===causes wiring short to ground---map sensor--baro sensor---ECM
code p 0122 refers to
(1)throttle position(TP) sensor A/ pedal position (APP) sensor A --low input ===causes ---wiring short to ground --TP/APP sensor/s---ECM
(2)TP switch and APP switch A--low input===causes -same as (1)
(3) TP sensor B/accelerator pedal position switch B---circuit malfunction====causes --wiring open/short to ground/short to positive--TP/APP switch--- ECM

(so i cleared the code..all was fine.) No it wasn't ,you don't just clear code's without doing the diagnostic's for that code . It's just a matter of time ,when the PCM/ECM - engine computer runs that test again, that light will come back on. P0455 is a large leak in the evaporative emission system .Sorry dude but you don't stand a snow ball's chance in guam of fixing this .
Do you know what electronic throttle control is ?
P2135 - ETC Throttle Position (TP) Sensor A/B Voltage Correlation Description: The powertrain control module (PCM) flagged a fault indicating that TP1 and TP2 disagree, or that TP1 should not be in the present position given the position of TP2 unless a concern is present. Possible Causes:

• TP sensor shorted internally to VREF.
• TP sensor harness is shorted to power.
• TP sensor signal wires are shorted together.
• Damaged TP sensor.

Diagnostic Aids: Compare the TP1 and TP2 PID values for a full sweep and correlation. Refer to the chart in pinpoint test DV. GO to Pinpoint Test DV .
Compare TP1 and TP2 PID values to the typical reference values in Section 6 . Application Key On Engine Off Key On Engine Running Continuous Memory All GO to DV4
P2110 - Throttle Actuator Control (TAC) System - Forced Limited RPM Description: The TAC system is in the failure mode effects management (FMEM) mode of forced limited RPM. Possible Causes:

• Cross-wired TAC motor.
• Damaged powertrain control module (PCM).

Diagnostic Aids: This DTC indicates only that the FMEM condition exists, and can be set in combination with DTCs P2100, P2101, or P2107, meaning the electronic throttle body (ETB) faults should be diagnosed first. Application Key On Engine Off Key On Engine Running Continuous Memory All GO to QE1
Do yourself a favor an take it to a qualified repair shop.

P2138 is Throttle Pedal Position Sensor/ Switch D / E Voltage Correlation. Replace the Throttle Pedal Position Sensor/Switch.Remember to have the set code Cleared from the cars computer, this will turn off the check engine light and reset it. Good Luck and have a good XMASS.

There are 3 DTC codes related to the TPS....

1. P0121 - Throttle Position (TP) Sensor Performance

2. P0122 - Throttle Position (TP) Sensor Circuit Low Voltage

3. P0123 - Throttle Position (TP) Sensor Circuit High Voltage

If there is any further assistance, please let us know

Check the vehicle for DTC'S - diagnostic trouble code's should be the first step in diagnosing this problem . But a tune - up not ! Reduced enging power is caused by a problem with the electronic throttle control . If you are not familiar with this ,your best bet would be to take to a qualified repair shop.
REDUCED ENGINE POWER: Refer to Powertrain Control Module Description in Engine Controls - 4.8L, 5.3L, and 6.0L

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 (TP)
Accelerator Pedal Position (APP) Sensor
The APP sensor is mounted on the accelerator pedal assembly. The APP is actually 2 individual APP sensors within 1 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.

One of these sensors could be sending conflicting data to the PCM - engine computer .

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.

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 signal, 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.

P0122 - Throttle Position (TP) Sensor Circuit Low Voltage
P0123 - Throttle Position (TP) Sensor Circuit High Voltage
without checking it 1st I would guess the TPS is most likely defective.
P0432 - Catalyst System Low Efficiency Bank 2, you may have to replace the Catalytic convertor, it may be worn out,
A WORD OF CAUTION: Don't use aftermarket cats, they tend to reset the same code due to compatibility issues, also replace the cat monitor sensor (looks like an O2 sensor) located just to the rear of the bank 2 cat converter.