Test Description
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The numbers below refer to the step numbers on the diagnostic table.
- 2: This step determines if the condition is present.
- 4: This step tests the signal circuit of the FTP sensor.
- 6: This step tests the 5-volt reference circuit of the FTP sensor.
DTC P0453
| 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 |
|
4.3 V | Go to Step 4 | Go to Step 3 |
| 3 |
|
- | Go to Step 4 | Go to Intermittent Conditions |
| 4 |
|
0.2 V | Go to Step 5 | Go to Step 7 |
| 5 | Test the FTP low reference circuit for a high resistance or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 13 | Go to Step 6 |
| 6 | Measure the voltage of the FTP 5-volt reference circuit with a DMM. Refer to Circuit Testing
in Wiring Systems. Is the Fuel Tank Pressure Sensor parameter within the specified value? |
4.8-5.2 V | Go to Step 9 | Go to Step 10 |
| 7 | Test the FTP signal circuit for a short to voltage or for a short to a 5-volt reference circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 13 | Go to Step 12 |
| 8 | Test for an intermittent and for a poor connection at 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 13 | Go to Step 12 |
| 9 | Test for an intermittent and for a poor connection at the FTP sensor. 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 13 | Go to Step 11 |
| 10 | Repair the short to voltage in the FTP 5-volt reference circuit. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 13 | - |
| 11 | Replace the FTP sensor. Refer to Fuel Tank Pressure Sensor Replacement
. Did you complete the replacement? |
- | Go to Step 13 | - |
| 12 | Replace the control module. Refer to Powertrain Control Module (PCM) Replacement
. Did you complete the replacement? |
- | Go to Step 13 | - |
| 13 |
|
- | Go to Step 2 | Go to Step 14 |
| 14 | 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 |