Driving to work this morning, engine light comes on...out of the blue. Oil is good, average temp day 70ish, really humid though.

Any ideas on where to start diagnosing? How do I check codes and where do the codes show up?

 

Codes should come up on your odo display by flipping the key 3 times....don't actually start it just go from off to run.

 

If there is an Autozone near you, they offer to plug in and read your codes for free.

 

Hmm-m-m.....an '05 with a 4.7? Well, in the past week I've gotten a P0404 (EGR valve) and a P0700 (transmission control malfunction). Going to the dealer in a few days.

Do the key thing. And do a search for codes on here and you can print out a multi-page document that tells you what the codes mean. On-Off-On-Off-On. Codes display on the odometer, then flash DONE.

 

did you ever figure anything out? I am throwing

P0645 A/C Clutch Relay Control Circuit
P0627 Fuel Pump "A" Control Circuit Open
P0462 Fuel Level Sensor Circuit Low Input
P0700 Transmission Control System Malfunction

any ideas?

 

Dude same thing happens to me.. I may be something else for you. But for me they told me it was air in my gas tank. I noticed when i put gas it turned on... Now it just goes on and off after refuling sometimes.. Sucks to see it but hey...

 

Mines driving like a tractor. It sucks *****, i tired of this truck. I am ready for a car/truck that actually works all the time.