Conditions For Clearing The Mil/DTC
- 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 P2120
| 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 - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
|
0.13 V 4.87 V |
Go to Step 4 | Go to Step 3 |
| 3 |
|
- | Go to Step 4 | Go to Intermittent Conditions |
| 4 |
|
0 V | Go to Step 5 | Go to Step 10 |
| 5 |
|
5 V | Go to Step 6 | Go to Step 7 |
| 6 | With a test lamp connected to B+, probe the APP sensor low reference circuit. Does the test lamp illuminate? |
- | Go to Step 16 | Go to Step 12 |
| 7 | With a DMM, measure the voltage of the APP sensor 1 5-volt reference circuit. Does the DMM indicate voltage at the specified value? |
5 V | Go to Step 9 | Go to Step 8 |
| 8 | Does the DMM indicate voltage less than the specified value on the APP sensor 1 5-volt reference circuit? | 5 V | Go to Step 13 | Go to Step 15 |
| 9 | Test the APP sensor 1 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 20 | Go to Step 11 |
| 10 | Test the APP sensor 1 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 20 | Go to Step 18 |
| 11 | Test the APP sensor 1 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 20 | Go to Step 18 |
| 12 | Test the APP sensor 1 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 20 | Go to Step 18 |
| 13 | Test the APP sensor 1 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 20 | Go to Step 14 |
| 14 | Test the APP sensor 1 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 20 | Go to Step 18 |
| 15 | Test the APP sensor 1 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 20 | - |
| 16 | Inspect for poor connections at the accelerator pedal 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 20 | Go to Step 17 |
| 17 | Replace the accelerator pedal assembly. Refer to Accelerator Pedal with Position Sensor Replacement
. Did you complete the replacement? |
- | Go to Step 20 | - |
| 18 | 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 20 | Go to Step 19 |
| 19 | Replace the PCM. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 20 | - |
| 20 |
|
- | Go to Step 2 | Go to Step 21 |
| 21 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? |
- | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK |