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Check Engine Soon Light
CHECK ENGINE LIGHT
1999 Ford Expedition
Have a 1999 ford expedition, code 171 & 174 have been read on my OBD 2 scanner. What do has to be checked or replaced to erase these codes?
Sunday, April 3rd, 2011 AT 4:10 PM
02 sensors are reading lean, but with that many miles the should be replaced. Also check for vacuum leaks at the pcv rubber elbow its a known leaker.
Sunday, April 3rd, 2011 AT 5:28 PM
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