Limp mode

Jan 10, 2023
6
0
1
Please someone who can help me with this waste of truck that are just problems, I already changed the ambient temperature sensor, the mass air sensor and the brake pedal sensor and it continues to give the same problem, the truck is in limp modeScreenshot_20230107_215918_Chrome.jpg
 

Ron Nielson

Active member
Oct 11, 2009
499
60
28
Berryton, KS
Did you clear the codes, or did you just expect them to clear on their own? If you cleared them, then took key out (not always necessary but maybe) and then back to on, then rescan that may get the job done.

Electrical devices always require a complete circuit with correct voltages and appropriate ground. The codes you receive say the voltage is high, likely a short to voltage. There is no single common wire, but all connect to the ECM.
 
Jan 10, 2023
6
0
1
Since there is no faulty cable or sensor, I'm going to think it would be the ecm, I've seen some places that sell programmed ecms, is it safe to buy the ECM?
 

2004LB7

Well-known member
Dec 15, 2010
4,614
637
113
Norcal
Could be a faulty shorted sensor that is connected to that 5 volt line. Did you ohm out the wires?