My 2000 WJ I6 4L is giving me a P0203. I have swaped injector 3 with injector 4. The code stayed the same and did not move with the injector. I get 15ohms of resistance at the conector plug on the injector. I was wondering if anyone could give me some more ideas. i don't know where to go from here. Thank you for your time.
I reset it and it still comes back as cyl #3. I baught a test light tonight and plugged it into the conector and the light comes on and flashes like it should as if it where to send power to the injector. It looks the same as it does when I plug it into any other connectors. Could the P0203 code mean that the coil pack has gone bad. I have aready swaped plugs aroung no change. I am even more lost after the test light. it doesn't make any sence.
I'm not sure about the code. But for the pressure just turn the jeep to the ON position but do NOT start it. If the pressure reads anything but zero then the sensor is bad. That's a cheap and easy fix.
2002 4.7, Selec-Trac, K&N FIPK II, JetChip Stage 1.
I had about 3-4 cylinders spitting out codes, in addition to the TPS. Once that got replaced those codes magically vanished. Not sure if it'll help, but if the TPS is also in the code readout i'd do that first.