I have a 1990 Tuned Port in a Jeep Wrangler and I keep getting a code 22 for the Throttle Positioning Sensor Voltage Low. I have went through all the flow charts and everything is checking out fine. Has anyone else ran into this code? If so where should I go from here? Thanks for the help in advance!!

 

broken wires or bad connector. what is the tps reading? I would check on a scanner first. if you have a reading you know the wiring is good. if no reading check at the Sensor for referance volts ,ground and signal. if all is well there check the wiring.

should be fairly easy to shoot

 

Okay, I followed the manual exactly. Got a code 22, reset the code started it got the code again. Reset the code, jumpered the 5v reference wire to the to the signal wire, got code 21. Reset the code, read the voltage from the TPS. It was low, at 0.29V. Adjusted the voltage to 0.54V. Also checked the reference voltage just to make sure and it was at 5.0V. Buttoned everything up went and drove it for a while, 10 minutes into the drive got code 22 again. Checked the voltage and it was 0.29V. I can't imagine that the sensor could possibly move, I know it was tight. But just to make sure, I'm going to adjust it back to 0.54V again and mark the sensors position on the TB. Also, when I adjusted the sensor the first time I checked to see where it was at at WOT and it was only at 3.1V. Isn't it supposed to be above 4V? Any ideas what I might want to try next?

 

As long as you have a solid gound and your 5v ref, your problem lies within the sensor. Your right the voltage at wot should be anywhere between 4-5volts. Wouldn't be able to tell you for sure without seeing it in person , but sounds like the senser is shorted internally.

 

I tend to agree

 

Thanks, guys! I'll change it tomorrow and post an update.