what is P0420/P2195...fix those probs and the misfire and "should" be good...how many miles do u have on the truck? at 100K the plugs need to be changed so I would do the coils and plugs if not done already...
just under 200k I bought it with just under 180k
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
A code P0420 may mean that one or more of the following has happened: Leaded fuel was used where unleaded was called for
A damaged or failed oxygen sensor (HO2S)
Downstream oxygen sensor (HO2S)
wiring damaged or connected improperly
The engine coolant temperature sensor is not working properly
Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe
Retarded spark timing
The oxygen sensors in front and behind the converter are reporting too similar of readings
Leaking fuel injector or high fuel pressure
Cylinder misfire
Oil contamination
P2195 O2 Sensor Signal Stuck Lean Bank1 Sensor 1
Potential causes of a P2195 code include:
Oxygen (O2) or A/F ratio sensor or sensor heater malfunction
Open or short in O2 sensor circuit (wiring, harness)
Fuel pressure or fuel injector problem
Faulty PCM Intake air or engine vacuum leaks
Faulty fuel injector(s)
Fuel pressure too high or too low
PCV system leak/fault A/F sensor relay faulty
MAF sensor malfunction
ECT sensor malfunction Fuel pressure too low
Fuel leak
Air suction in air intake system
So pretty a needle in a haystack. I replaced my alternator shortly before this started happening which involved taking the air intake of, but I did check to make sure the two hoses and the two sensors were plugged back in.
