Conditions for Clearing the MIL/DTC
WARNING: This page is about a different variant/trim than selected.
- 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 P0453
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module (ECM) 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 |
|
4.9 V | Go to Step 4 | Go to Step 3 |
| 3 |
|
- | Go to Step 4 | Go to Intermittent Conditions |
| 4 |
|
4.8-6.0 V | Go to Step 5 | Go to Step 8 |
| 5 | Measure the voltage from the 5-volt reference circuit of the FTP sensor to a good ground with a DMM. Is the voltage near the specified value? |
5 V | Go to Step 6 | Go to Step 9 |
| 6 | Measure the voltage from the 5-volt reference circuit of the FTP sensor to the low reference circuit of the FTP sensor with a DMM. Is the voltage near the specified value? |
5 V | Go to Step 7 | Go to Step 10 |
| 7 | Connect a test lamp between the signal circuit of the FTP sensor and the low reference circuit of the FTP sensor. Does the test lamp illuminate? |
- | Go to Step 8 | Go to Step 11 |
| 8 | Test the signal circuit of the FTP sensor for a short to voltage or an open between the fuel tank wiring harness connector and the control module. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 9 | Test the 5-volt reference circuit of the FTP sensor for a short to voltage between the fuel tank wiring harness connector and the control module. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 10 | Test the low reference circuit of the FTP sensor for an open between the fuel tank wiring harness connector and the control module. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 11 |
|
- | Go to Step 16 | Go to Step 12 |
| 12 | Inspect for poor connections at the fuel tank harness connector and the FTP sensor 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 16 | Go to Step 14 |
| 13 | Inspect for poor connections at the harness connector of the control module. 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 16 | Go to Step 15 |
| 14 | Replace the FTP sensor. Refer to Fuel Tank Pressure Sensor Replacement
. Did you complete the replacement? |
- | Go to Step 16 | - |
| 15 | Replace the control module. Refer to Engine Control Module (ECM) Replacement
. Did you complete the replacement? |
- | Go to Step 16 | - |
| 16 |
|
- | Go to Step 2 | Go to Step 17 |
| 17 | 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 |