DPFE Sensor
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All DPFE's lead a hard life because they are exposed to elevated temperatures and lots of carbon and condensation from the exhaust gasses. Sometimes sooty water will pour out when the sensor is disconnected from its hoses. Unfortunately, with a DPFE, failure is more or less just a matter of time.
The original part installed at the factory for your era Ranger was made by Kavlico and it can have a fairly short service life. Aftermarket replacements are often worse.
The Motorola DPFE's used on some other year Rangers were much more reliable than the Kavlicos. I don't know if you can get the Motorola part in the correct configuration for the 01~03's but it would be the best bet.
The original part installed at the factory for your era Ranger was made by Kavlico and it can have a fairly short service life. Aftermarket replacements are often worse.
The Motorola DPFE's used on some other year Rangers were much more reliable than the Kavlicos. I don't know if you can get the Motorola part in the correct configuration for the 01~03's but it would be the best bet.
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CHECK THE 2 HOSES GOING TO THE DPFE SENSOR TOO, REPLACE IF BAD, ALSO IF THE EGR PORTS ARE A LITTLE CLOGGED IT WILL GIVE THE CODE TOO,ANOTHER COMMON PROBLEM WITH FORDS.. AND FINALLY TEST YOUR EGR VALVE MAKE SURE ITS GOOD
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