Sort of sad that when you disconnect a critical sensor, the CEL/MIL won't go on. Yet other times, you get pesky codes when the vehicle is running just fine. Ford misses the quality boat again. Just and FYI; the EPA compiled a report of the most common DTC's reported....
Any guesses as to the most popular DTC's???
Here are the top 10...
Rank____DTC____________________________________________%
1_______P0420 --Low Catalyst Efficiency______________10.7%
2_______P0171 --System Too Lean______________________10.1%
3_______P0401 --EGR Flow Insufficient_________________7.0%
4_______P0174 --System Too Rich_______________________6.0%
5_______P0300 --Random Misfire________________________4.6%
6_______P0141 --02 Sensor Heater Circuit______________4.5%
________________Malfunction
7_______P1443 --Ford Evaporative Control______________4.2%
________________Valve Failure
8_______P0135 --02 Sensor Heater Circuit______________4.0%
________________Malfunction
9_______P0133 --02 Sensor Circuit Slow Response_______3.9%
10______P0455 --Evaporative Emission__________________3.4%
________________Control System Leak Detected
________________(gross leak)
_______________________________________Total Top 10__58.5%
Not a single transmission code in the bunch!
