Conditions for Clearing the MIL/DTC
WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. 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 P0496
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Emission Hose Routing Diagram | ||||
| 1 | Did you perform the Diagnostic System Check - Engine Controls? | - | Go to Step 2 | Go to Diagnostic System Check - Engine Controls |
| 2 |
|
-1 to +1 in H2O | Go to Intermittent Conditions | Go to Step 3 |
| 3 |
|
-1 to +1 in H2O | Go to Step 4 | Go to Step 5 |
| 4 | Replace the EVAP purge solenoid valve. Refer to Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement
. Did you complete the replacement? |
- | Go to Step 6 | - |
| 5 | Replace the fuel tank pressure (FTP) sensor. Refer to Fuel Tank Pressure Sensor Replacement
. Did you complete the replacement? |
- | Go to Step 6 | - |
| 6 |
|
-1 to +1 in H2O | Go to Step 7 | Go to Step 2 |
| 7 | 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 |