How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Pete Your Own Question
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 24729
Experience:  14 years GM dealer Technician.
14928985
Type Your Chevy Question Here...
Pete is online now
A new question is answered every 9 seconds

Howdy, I'm having trouble with my 2008 silverado pickup. I t

Customer Question

Howdy, I'm having trouble with my 2008 silverado pickup. I hit 18" of water at 70 mph few months ago and it killed my truck. After pulling the fuel tank and cheking the fuel pump I found the connection to the FPCM had come loose and hooked it back up. After that it would run for 30 min then die getting a reduced engine power on the dash. I would have to wait an hour before it would start again. I purchased a code reader and cleared everything now I have code P1682 and it will crank but wont start anymore. I have tools and multi meter, I just don't know what to test or check next
Submitted: 1 year ago.
Category: Chevy
Expert:  Pete replied 1 year ago.
My name is ***** ***** I am a professional here at Just Answer. I noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
The code you have set here if for a fault with the Ignition switch circuit 2.Heres a description of the fault.
There are 2 ignition 1 voltage circuits supplied to the engine control module (ECM). The first ignition circuit is provided by the power train relay, through a fuse. This ignition 1 voltage circuit supplies power to all the internal ECM circuits associated with the throttle actuator control (TAC) operation. The second ignition 1 voltage circuit is supplied by the run/crank relay through a fuse, and is used to power the remaining internal ECM circuits. If the ECM detects a voltage difference between the 2 ignition 1 voltage circuits, DTC P1682 will set.
There is a diagnostic test procedure for this code to pinpoint the fault but the most common causes or a wet or corroded or damaged under hood fuse panel or broken wiring in the panel or blown ignition fuse.This can also lead to the engine computer at fault.
If you want me to post the test procedure for this code let me know and I will see what I can locate on this.
Thanks Pete

Related Chevy Questions