Conditions for Clearing the MIL/DTC
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
DTC P2125
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check-Engine Controls? | - | Go to Step 2 | Go to Diagnostic System Check - Engine Controls |
| 2 |
|
0.13 V 4.87 V |
Go to Step 5 | Go to Step 3 |
| 3 |
|
- | Go to Step 4 | Go to Intermittent Conditions |
| 4 |
|
5 V | Go to Step 5 | Go to Step 12 |
| 5 | With a test lamp connected to ground, probe the APP sensor 2 signal circuit. Does the test lamp illuminate? |
- | Go to Step 11 | Go to Step 6 |
| 6 | With the test lamp still connected to the APP sensor 2 signal circuit, observe the APP sensor 2 parameter. Does the scan tool indicate voltage at the specified value? |
0 V | Go to Step 7 | Go to Step 11 |
| 7 | With a DMM measure the voltage of the APP sensor 2 5-volt reference circuit. Does the DMM indicate voltage at the specified value? |
5 V | Go to Step 8 | Go to Step 10 |
| 8 | With a test lamp connected to B+, probe the APP sensor 2 low reference circuit. Does the test lamp illuminate? |
- | Go to Step 9 | Go to Step 14 |
| 9 | Test the APP sensor low reference circuit for a short to ground. Did you find and correct the condition? |
- | Go to Step 22 | Go to Step 18 |
| 10 | Does the DMM indicate voltage less than the specified value on the APP sensor 2 5-volt reference circuit? | 5 V | Go to Step 15 | Go to Step 17 |
| 11 | Test the APP sensor 2 signal circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 22 | Go to Step 13 |
| 12 | Test the APP sensor 2 signal circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 22 | Go to Step 20 |
| 13 | Test the APP sensor 2 signal circuit for a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 22 | Go to Step 20 |
| 14 | Test the APP sensor 2 low reference circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 22 | Go to Step 20 |
| 15 | Test the APP sensor 2 5-volt reference circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 22 | Go to Step 16 |
| 16 | Test the APP sensor 2 5-volt reference circuit for a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 22 | Go to Step 20 |
| 17 | Test the APP sensor 2 5-volt reference circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 22 | - |
| 18 | Inspect for poor connections at the accelerator pedal harness connector. Refer to Testing for Intermittent Conditions and Poor Connections
andConnector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 22 | Go to Step 19 |
| 19 | Replace the accelerator pedal assembly. Refer to Accelerator Pedal Position (APP) Sensor Replacement
. Did you complete the replacement? |
- | Go to Step 22 | - |
| 20 | Inspect for poor connections at the powertrain control module (PCM) harness connector. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 22 | Go to Step 21 |
| 21 | Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement
. Did you complete the replacement? |
- | Go to Step 22 | - |
| 22 |
|
- | Go to Step 2 | Go to Step 23 |
| 23 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? |
- | Go to Diagnostic Trouble Code (DTC) List | System OK |