Multiple Codes
 

Hi, I have a 2001 F-150 4.6L While driving through town my check engine light and my oil temp light comes on and the overdrive light on my shift lever is flashing. My idle increases to 2K and all this lasts one minute. I check for codes and come up with :

P0113 IAT sensor 1 circuit high input
P1289 Cyl. head temp sensor circuit high input
P0340 Camshaft position sensor A - bank 1 circuit failure
P0123 TPS pedal position sensor circuit 1 high input
P0453 EVAP emmision control system pres sensor high
P0708 Trans range sensor circuit high input

Has anyone seen this before? How can I fix it?

Notice they are all circuit highs.
A look at the circuit drawings shows they are all on a common feed.
There is a relay that feeds this circuit and a 30 amp fuse.
The ignition switch operates this relay thru a diode and another 30 amp fuse.
Take a close look at your fuses first, then the relay and the diode.
The whole PCM operation is essentially dead at this point but for stored codes. (your lucky)
Not as big a problem as it looks.
There may be a reason why a fuse has blown as the original real fault.

Thank You for your help. I checked all the fuses but did not test the relays or diode. I will try it this weeked and and let you know how it turns out.

Any mods done to the truck? Any exhaust or transmission work done to the truck lately? A chaffed wire can short to ground or power and cause these codes. Look for wires that are rubbed or melted.

JMC

No the truck is all original and I will keep it that way to avoid creating potential bugs. I purchased the truck in 2006 after driving GMC for thirty years and love this F-150. I will keep this one a long time.