Codes P0340 And P0430

Some more information here also....

I also had a Misfire on cylinder 1 a while ago (it has not come back) so I replaced all the plugs. Didn't replace any wires.

Sometiems when I start the car, it stutters a bit. Since replacing the plugs it is ALOT better, but still does it from time to time. Almost to the point where it seems it may want to stall.

Originally posted by garnold0611@Apr 13 2004, 10:01 AM
Some more information here also....

I also had a Misfire on cylinder 1 a while ago (it has not come back) so I replaced all the plugs. Didn't replace any wires.

Sometiems when I start the car, it stutters a bit. Since replacing the plugs it is ALOT better, but still does it from time to time. Almost to the point where it seems it may want to stall.

Click to expand...

Check IAC (Idle air control)

-DC

There is a CPS (camshaft position sensor) in the G3's and G4's. That sensor might be goin bad. The sensor just threads into the engine block - it's not that hard to replace. Th O2 sensor will not affect the cam position that way. The O2 sensor will, however, cause the engine to run lean, which can be a big problem. I would replace both forward (pre-Cat) sensors as soon as possible.

Take it to a Ford Dealer for proper Diagnosis. There's ALOT more to driveability repair than just reading codes! Other problems can cause trouble codes for the
Cam Sensor, & Oxygen sensor w/out those particular parts being bad. IF the Cam
sensor IS bad, it's a good idead to replace the Camshaft Synchronizer as well. It looks like a distributor shaft & the sensor attaches to the top of it. It can be tricky for an amature w/out the correct alignment tool! NO adjustments can be made after installation... so ya' better get it right the first time.

i had a OBD scan come back with a bad Camshaft sensor and a a code for O2 sensors being rich and lean. I was thinking that the bad camshaft sensor was causing improper pulse width which resulted in rich and lean conditions. I havent inspected the sensor yet but im skeptical about replacing the whole assembly with the sensor. I dont really feel like dishing out 30 bucks for a plastic specialty tool to align the shaft, in addition to the sensor. Ill definately test the voltage before i pull the sensor and go from there. Does anyone know what would cause the shaft assembly to fail?