Loss of power

[paradisecustom]

2008 258 ALP Hino. Was coming back from a tow job with my Hino rollback and the check engine light came on. Lost power and could only go 5 mph uphill and 35 mph on the straightaway. Came back to shop and checked the codes - P0088, P2101, P2103. I took the hose off between throttle body and air charge cooler. When I shut it off, the throttle plate was still open approximately 1/4 way from the throttle body. I sprayed carburetor cleaner on, replaced the hose. It seemed to be running fine. I took it to another tow last night 8 miles away and it drove perfectly until I started back. The check engine light came back on, lost power again. If this is the throttle body and I replace it, do I have to take it to dealer to program it?

 

[greasytshirt]

Was it going an automatic regen at this time? It will try doing one when the DPR graph hits three bars. Low power during regen on 2008-2010 trucks is generally an airflow problem. Do a search for how to modify the ITV, make sure the throttle plate is very secure on the shaft.

 

[paradisecustom]

The throttle plate is tight on the shaft, but I can open and close the throttle plate very easily with my finger when the HINO is not running and it's open approximately 1/4 of the way when shut off. (Is this normal?)
Code P2101 - Intake Air Throttle sensor stuck
Code P2103 - DC Motor or Ground Short Circuit

 

[greasytshirt]

Yes, that's normal. Check the wiring harnesses near the ITV carefully, sometimes the wires rub through and short. ITVs don't often fail electrically, so I'd expect harness issues.