For 1990-2009 cars
Handling ESD Sensitive Parts Notice
Engine Controls Components
Cell 20: Throttle Position (TP) Sensor
OBD II Symbol Description Notice

### Circuit Description

The ECM monitors the actual throttle blade position using TP sensor 1 and 2. If the throttle blade is open more than the ECM desires by a calibratable amount this DTC will set.

### Conditions for Running the DTC

The electronic throttle control (ETC) learn procedure is not active.

### Conditions for Setting the DTC

The difference between the calculated and the actual throttle position is more than what is shown in the following table:

Calculated Throttle Position | Actual throttle Position
--- | ---
0 | 4
0-3 | 6
1 | 11
5 | 20
15 | 30

### Action Taken When the DTC Sets

The ECM illuminates the malfunction indicator lamp (MIL) and records the operating conditions in the Freeze Frame on the first drive trip that the diagnostic runs and fails.

The vehicle will default to the limp home mode.

### Conditions for Clearing the MIL/DTC

• | The ECM turns off the MIL after three consecutive drive trips that the diagnostic runs and passes.

• | A History DTC clears after forty consecutive warm-up cycles in which there are no failures reported of this diagnostic or any other emission related diagnostic.

• | The ECM battery voltage is interrupted.

• | The scan tool clears the MIL/DTC.

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | Go to Step 2 | Go to Powertrain On Board Diagnostic (OBD) System Check
2 | Diagnose and repair any electronic throttle control DTCs before proceeding. Are any other DTCs displayed? | -- | Go to the applicable DTC table | Go to Step 3
3 | Visually inspect the throttle body to ensure that the throttle body valve is in the closed position. Is the throttle valve closed? | -- | Go to Step 4 | Go to Step 7
4 |

1. Install a scan tool.
2. Monitor the throttle position TP sensor 1 and TP sensor 2 voltages.

Is the voltage within the specified range?

0.16-.080 V (TP1)

4.0-4.8 V (TP2)

Go to Step 8

Go to Step 5

5 | Inspect the TP sensor 1 and TP sensor 2 circuitry for an open, a short to ground, a short together or resistance. Did you find a faulty circuit? | -- | Go to Step 6 | Go to Step 8
6 | Repair the circuit as necessary. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 9 | --
7 | Replace the throttle body assembly. Refer to Throttle Body/Throttle Position Sensor Replacement . Did you complete the repair? | -- | Go to Step 9 | --
8 | Important: This vehicle is equipped with a theft deterrent system that interfaces with the engine control module (ECM). Program the new ECM with the frequency code of the theft deterrent module that is currently on the vehicle. Replace the ECM. Refer to Engine Control Module Replacement/Programming .

Is the action complete?

--

Go to Step 9

--

9 |

1. Using the scan tool, clear the DTCs.
2. Start the engine.
3. Allow the engine to idle until the engine reaches the normal operating temperature.
4. Select DTC and the Specific DTC function.
5. Enter the DTC number that was set.
6. Operate the vehicle within the Conditions for Running this DTC until the scan tool indicates that the diagnostic Ran.

Does the scan tool indicate that the diagnostic Passed?

--

Go to Step 10

Go to Step 2

10 | Does the scan tool display any additional undiagnosed DTCs? | -- | Go to the applicable DTC table | System OK