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Home >> Chevrolet >> 2004 >> Avalanche 2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Control System - 4.8L, 5.3L & 6.0L (DTC P0452 To DTC P2120)) >> Diagnostic Information and Procedures >> DTC P0496 >> Conditions for Clearing the MIL/DTC

Conditions for Clearing the MIL/DTC

WARNING: This page is about a different variant/trim than selected.
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. Start the engine.
  2. Seal the evaporative emission (EVAP) system using the Purge/Seal function with a scan tool.
  3. Increase the engine idle to 1,200-1,500 RPM.
  4. Observe the fuel tank pressure sensor in H2O with a scan tool.
Is the fuel tank pressure sensor parameter within the specified value?
-1 to +1 in H2O Go to Intermittent Conditions Go to Step 3 
3
  1. Turn OFF the ignition.
  2. Disconnect the EVAP purge pipe from the EVAP purge solenoid valve.
  3. Turn ON the ignition, with the engine OFF.
  4. Observe the fuel tank pressure sensor in H2O with a scan tool.
Is the fuel tank pressure sensor parameter within the specified range?
-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 (1500 Series) or Fuel Tank Pressure Sensor Replacement (2500 Series) .
Did you complete the replacement?
- Go to Step 6  -
6
  1. Connect all EVAP hardware that was previously disconnected.
  2. Seal the EVAP system using the Purge/Seal function with a scan tool.
  3. Start the engine and idle at 1,200-1,500 RPM.
  4. Observe the fuel tank pressure sensor parameter with a scan tool.
Is the fuel tank pressure sensor parameter within the specified range?
-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