Question about 1997 Ford Expedition
Code P1451 is a EVAP control system canister vent solenoid circuit malfunction. If you're lucky it's just a bad gas cap but chances are the solenoid is bad or the wires leading to it are damaged or broken (more likely). Check the attached diagram for the canister location and have a look. If it's just damaged wires you can soldier a new wire splice in place and shrink tube it for protection. Make sure it's not going to rub against any metal that will damage it again.
Posted on Jun 02, 2014
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Posted on Jan 02, 2017
EVAP Control System Canister Vent Solenoid Circuit Malfunction
The EVAP system monitors the canister vent (CV) solenoid circuit for an electrical failure.
The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified canister vent duty cycle by PCM command.
Symptoms: You will likely not notice any drivability problems.
Causes: A code P1451 may mean that one or more of the following has happened:
*VPWR circuit open
*Damaged canister vent solenoid
*Canister vent solenoid circuit open or shorted to ground, power, etc.
*Damaged Powertrain Control Module (PCM)
*Possible SolutionsVerify canister vent solenoid - To verify normal functioning, monitor the EVAP canister vent solenoid signal PID EVAPCV and the signal voltage
(PCM control side).With the valve open, EVAPCV indicates 0% duty cycle and a voltage approximately equal to battery voltage.
When the valve is commanded fully closed, EVAPCV indicates 100% duty cycle, and a minimum voltage drop of 4 volts is normal.
Output test mode may be used to switch output on/off to verify function.
*Replace canister vent solenoid
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Posted on Sep 29, 2010
SOURCE: p1451 error code
Try disconnecting the battery for about 20 minutes or so. This could reset the light. If it does not, call the dealer, service department and ask them to tell you how to reset the light.
I hope this helps you.
Posted on Sep 09, 2009
SOURCE: What is the code P1451 solution?
P0171 - System too Lean (Bank 1)
P0174 - System too Lean (Bank 2)
P1451 - EVAP Control System Canister Vent Solenoid Circuit Malfunction
I'm afraid I don't have enough info to tell you how to fix the P1451 but I'm certain it's the cause of the other two codes.
Posted on Jun 08, 2010
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