Question about 1995 Ford Ranger Supercab
Most likely all is not neccesary, sounds like they dont know what the prob. is so they want to replace every thing... i would try another garage
Posted on Jun 04, 2009
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Posted on Jan 02, 2017
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Oct 31, 2016 | Cars & Trucks
Aug 29, 2012 | 2002 Mitsubishi Eclipse
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.
You may notice drivability problems such as the engine may surge off idle. There may also be other symptoms.
A code P0402 most likely means one or more of the following has happened:
With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.
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