P0113/P0122/P0351 2000 Ford - focus

Question

I am getting all 3 codes at the same time. engine runs rough/stalls at idle. engine will smooth out at a forced high idle and will not run at all above 25% throttle. The one common thing that seems to come up is PCM is bad. Would any one of these codes trigger the rest?

Answer 1

P0351 Ignition coil A primary / secondary circuit malfucntion

P0113 Intake air temperature circuit high input

P0122 Throttle position sensor Switch A circuit low input

Fix P0351 first. , The reason for P0351 is the secondary is not creating the ignition spark. P0351 usually occurs when  a tune up is performed and  replacing the sparkplug and applying dielectrical grease on the sparkplugs which is recommended, But it is over done with too much that prevents proper ignition to occur and as a result P0351 occurs, P0351 is not cause by a PCM . As for P0113 depending on the type of engine this is. the IAT is part of the MAF (mass airflow) but this is on some models.P0113 is circuit high ,circuit high code condition are always a disconnection of the componenet, either at the sensor or its harness. P0122  and may have been set due to P0351,