P0440 Diagnostic Trouble Code Discussion for January 2014
General EVAP System Failure
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| Help Request | Posted | |
| 2001 GMC Yukon XL 1500 SLT 5.3L MIL Lamp on VIN: 3GKEC16T91 P0440: evap fault. tank pressure voltage reads 1.25v when i use my modis to command purge solenoid to 10% or more there is no change to tank pressure voltage. 12v to purge solenoid and opens when control wire is grounded manually. im thinking ecm driver is not grounding control ... |
January 24, 2014 |
