Communication error with OBDII Scanner

austxtaco · #1 (**permalink**) 05-18-2007, 08:12 PM

I have a 99 Taco SR5 w/ 2.4l 4 cyl. My CEL came on and stayed on (no blinking), I took my truck to a shop for some other work (trans & diff fluid change/ new shocks). They plugged in a scanner to the OBDII (for free) and it came back with a communication error. I changed the plugs & wires and cleaned my K&N filter. It went off and came back on a few days later. I went to autozone and they could not connect to it either. It has been several weeks now and it as been going on & off. Anyone ever seen this kind of problem before? Any help would be greatly appreciated.

KdF · #2 (**permalink**) 05-19-2007, 02:44 PM

Only suggestion I can think of is to disconnect the battery for about 30 min. to reset the computer. Then try it.

Eddie · #3 (**permalink**) 05-19-2007, 06:20 PM

The shop may have the wrong OBD2 protocol selected in the scantool.

austxtaco · #4 (**permalink**) 05-21-2007, 01:49 PM

I finally broke down & went to the dealership. I talked with one of the techs there & he hooked up a scanner to it fro free. Turns out it is throwing a P0401. I guess there are a few different scanners out there that don't use whatever protocol that tacos use. Thanks for all the suggestions