Ford Escape 2001 Code P0402
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Ford Escape 2001 Code P0402
Hi,
Keep getting this code.
I've done a Tune Up, New Cat Converter, New EGR Value.
I've cleared it a few times but it still keeps coming up.
Fuel mileage seems to be worse that normal although the truck is running fine.
Would love some help?
Wondering if it could the Exhaust Manifold Cat Converters?
Thaks
Keep getting this code.
I've done a Tune Up, New Cat Converter, New EGR Value.
I've cleared it a few times but it still keeps coming up.
Fuel mileage seems to be worse that normal although the truck is running fine.
Would love some help?
Wondering if it could the Exhaust Manifold Cat Converters?
Thaks
Postmaster
Joined: Aug 2004
Posts: 4,004
Likes: 1
From: North of Boston MA
Have you checked all the vacuum lines? Make sure everything is where it is supposed to be and all the connections are tight.
You may also have a bad sensor (DPFE?) that is causing the EGR valve to remain open.
You may also have a bad sensor (DPFE?) that is causing the EGR valve to remain open.
Senior User
Joined: May 2004
Posts: 279
Likes: 0
From: Trappe Pa
The DPFE sensor has three wires.
One wire should be 5 volts. This powers up the sensor.
One sensor is zero volts. This is the sensor ground.
One wire is 1 volt. This wire is the signal return wire. The signal return wire must be 1 volt with the ignition key on and the engine off. A bad sensor usually shows 0.5v (1/2 volt) or less or 3 volts or more when it fails.
The above voltages are checked with the sensor electrical connector plugged in and the wires are back probed with the Red lead of a digital volt meter. The Black lead of the voltmeter will be connected to ground or the negative battery terminal and not be moved during the above checks.
2001 model year sensor wire colors are:
Brown/White wire is the 5 volt wire
Brown/Light Green wire is the ground wire
Orange wire is the signal return wire which should be 1 volt key on engine off
One wire should be 5 volts. This powers up the sensor.
One sensor is zero volts. This is the sensor ground.
One wire is 1 volt. This wire is the signal return wire. The signal return wire must be 1 volt with the ignition key on and the engine off. A bad sensor usually shows 0.5v (1/2 volt) or less or 3 volts or more when it fails.
The above voltages are checked with the sensor electrical connector plugged in and the wires are back probed with the Red lead of a digital volt meter. The Black lead of the voltmeter will be connected to ground or the negative battery terminal and not be moved during the above checks.
2001 model year sensor wire colors are:
Brown/White wire is the 5 volt wire
Brown/Light Green wire is the ground wire
Orange wire is the signal return wire which should be 1 volt key on engine off
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