DTC P0225 Accelerator Pedal Position (APP) Sensor 3 Circuit. Chevrolet Chevy P32 RV/Van Chassis 1999

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1999 🢒 Chevy P32 RV/Van Chassis 🢒 DTC 🢒 DTC P0225 Accelerator Pedal Position (APP) Sensor 3 Circuit

Engine Controls Components
Cell 22: Engine Data Sensors and Wastegate Solenoid
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice

Circuit Description

The Accelerator Pedal Position (APP) module provides a voltage signal that changes relative to the accelerator pedal position. There are three sensors which are located within the APP module that are scaled differently.

Conditions for Running the DTC

The igniton switch in the on position.

Conditions for Setting the DTC

•	The reference voltage on the APP 3 is below 4.8 volts.

•	All diagnostic set conditions met for 2 seconds.

Action Taken When the DTC Sets

•	The Service Throttle Soon lamp will not illuminate when one APP DTC sets. The PCM will only illuminate the service throttle soon lamp when multiple APP DTCs set.

•	The PCM records the operating conditions at the time the diagnostic fails. This information stores in the Failure Records.

Conditions for Clearing the MIL/DTC

•	A History DTC will clear after forty consecutive warm-up cycles, if this or any other emmision related diagnostic does not report any failures.

•	Use of a scan tool will clear the DTC codes.

Diagnostic Aids

An intermittent may be caused by the following:

•	Poor connections

•	A rubbed through wire insulation

•	A broken wire inside of the insulation

All of the 5 volt reference circuits must be checked for a proper reference voltage. Voltmeter accuracy is important.

Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

This step will check all 5 volt reference circuits.

Step	Action	Value(s)	Yes	No
1	Important: Before clearing any DTCs, use the scan tool Capture Info to save the Freeze Frame and Failure Records for reference. The control module's data is deleted once the Clear Info function is used. 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	Disconnect the APP sensor electrical connector. Turn the ignition ON leaving the engine OFF. With a J 39200 DMM connected to ground, check all the APP 5 volt reference circuits at the APP harness connector. Is the voltage less than the specified value?	4.8 V	Go to Step 5	Go to Step 3
3	Are any other APP DTCs set?	--	Go to the applicable DTC table	Go to Step 4
4	The DTC is intermittent. If no additional DTCs are stored, refer to Diagnostic Aids. If additional DTCs were stored, refer to the applicable DTC table(s) first. Are any additional DTCs stored?	--	Go to the applicable DTC table	Go to Diagnostic Aids
5	Turn the ignition OFF. Disconnect the PCM and check the 5 volt reference circuit for a short to ground. If the 5 volt reference circuit is shorted to ground, repair it as necessary. Was the 5 volt reference circuit shorted to ground?	--	Go to Step 7	Go to Step 6
6	Important: The new PCM must be programmed. Refer to Powertrain Control Module Replacement/Programming . Replace the PCM. Is the action complete?	--	Go to Step 7	--
7	Using the scan tool, clear the DTCs. Start the engine. Allow the engine to idle until the engine reaches normal operating temperature. Select DTC and the Specific DTC function. Enter the DTC number which was set. Operate the vehicle, with the Conditions for Setting this DTC, until the scan tool indicates the diagnostic Ran. Does the scan tool indicate the diagnostic Passed?	--	Go to Step 8	Go to Step 2
8	Does the Scan tool display any additional undiagnosed DTCs?	--	Go to the applicable DTC table	System OK