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96 ford explorer failed emissions test with codes p0401,p0402,p0755,p0756

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P0401
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

P0402
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0402 code means that OBD detected an excessive amount of EGR.

There sound like a bad EGR and need replace it.

P0755 Shift Solenoid B Malfunction and P0756 Shift Solenoid B Performance or Stuck Off. First I suggtes check leve fluids and preventive maintenance.

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Posted on Sep 02, 2010

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Don't explain what it is because that not going to help, tell us what part to buy or what to do so we can buy the part or do what needs to be done to pass. Time is running when you have to read 100 post and still guessing.

Posted on Jun 10, 2013

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401 and 402 (EGR flow insufficient) are likely a failed DPFE sensor. (EGR sensor) reformulated gasoline eats them alive. fix that, and clear the codes. the 755 and 756 are transmission codes usually shift solenoids, or lockup converter.

Posted on Sep 02, 2010

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I have a 96 explorer 4.0 4wd, failed emissions DTC codes P0125, P0756, P0340....are these costly repairs?


P0125 is Insufficient Coolant Temp For Closed Loop Fuel Control

P0756 is Shift Solenoid B Performance or Stuck Off
P0340 is Camshaft Position Sensor Circuit Malfunction

The P0125 can probably be cleared by replacing the thermostat. That part is under $15.00
The P0340 can probably be cleared by replaceing the Cam position sensor. That part is about $25.00

The P0756 is a transmission issue and It will involve removing the fluid pan and taking out the valve body to get to the solenoid.

The thermostat and cam sensor should take about an hour of shop time to change so I would figure about $150.00 to $200.00..Depends on the shop and if there is a minumum charge. Some shops charge 4 hrs. min.

the trans issue may get involved so I don't really want to make a guess, but I would say less than $500.00, depends on what all is involved in getting to the solenoid and changing it.

Jan 17, 2011 | 1996 Ford Explorer

1 Answer

My Ford Taurus just failed a vehicle emission test due to diagnostic codes P0401, P0402, and P1400. Can you tell me what these codes are for and what type of repair is needed? Thanks.


plz check the fuel and carborater first then go for silencer (if your car runned above 15000 kms got repair shop) even u can neglet, coz thees error come during winter sesion [they are related to carben and moister]

Jun 23, 2010 | 2002 Ford Taurus

4 Answers

P0401,p0402,p1405,p0171,p0174,p1131,p1151


I have a 1996 ford f150 4.9 liter.The truck runs great but bad gas mileage.the only problem is i am getting codes p0401and p0402 what should i do.

Oct 14, 2009 | 2000 Ford Windstar

1 Answer

My 96 Ford Explorer is up for it's registration well we thought that it was going to pass because we really haven't had problems with but the engine check light did come on so I figured that maybe it was...


code 402, I would replace DPFE sensor .
code 761- is transmission shift solenoid related, and may be as simple as replacing a clip/retainer in that part of the transmission, unfortunately basically one side of transmission needs to be disassembled to do so. With that said, I'd have an estimate done at 2 or 3 places including a ford dealer, as it may be related to a technical service bulletin that the dealer should have on record, or could be something as simple as a bad connection at one of the wiring connectors. personally I'd fix problem for code 402, then have them erase all codes & see if it comes back. I suspect for code 761, you would feel some shifting problems at least occasionally for that code. If it doesn't come back, I wouldn't worry about it, except maybe a fluid & filter change if not done recently.

Aug 02, 2009 | 1996 Ford Explorer

1 Answer

Codes p0402 and p1443 96 ranger


this means exactly what it says, the emission control valve is faulty and needs replacing.
Basically the valve is in an open position when it should be shut or partially shut.
Replace the valve and this should cure both codes.

May 07, 2009 | Ford Ranger Cars & Trucks

1 Answer

Emisions failures


catalytic converter ineffeicentcy and o2 sensor moderately expensive but cheaper than anew car payment : )

Jun 10, 2008 | 1996 Ford Explorer

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