all kinds of codes

[tomyweld]

I have a 2001 dually with auto. and engine light came on and 3 codes came up. p 1316,po 478, po470. Can anyone give me a clue what to look for or where to start. It barely runs. The p1316 is Injector circuit idm codes detected and the other two are exhaust codes for pressure control valve high input I am very sad! Can't afford the millions at the dealer. I need to figure this thing out for myself!

[toobadq]

P1316 shows IDM codes. you need a scanner to run the tests. Inj, self test and cly balance test. I would say you have a shorted inj, but with out a scanner that will run the tests you'll have a hard time finding it. Did it happen all at once? It might be the undervalve cover connector came unplugged. If you can not get a scanner, try pulling the valvecovers to check the connectors that pass thru the gasket.
Best of luck

[tomyweld]

1 day the engine light came on ,and when I got home ,I pulled the codes with my superchips scanner to find these three codes stored all at the same time. Never had a problem with it since new! Now has 70,000 miles. Thanks

[99Smokin73Stroker]

I get multiple codes like that occasionally with my TS chip. It's only after I floor it and push it real hard back to back and stuff. They I've gotten the 0470 and 0478 a lot, and other high input codes like that