I changed all of the O2 sensors about two weeks ago because the Truck was new to me and it had codes indicating the O2 sensors were bad (or the combustion wasn't right). When I got to changing the front driver's side O2 sensor, I pulled the truck's sensor connector from the pins that go in it. I couldn't reach the pins to put them back in the holes, so I cut and spliced the cables to extend them and then wired them incorrectly. Codes P0134 and 0150 popped up and so I figured the wording was bad. This was when I found that I had connected the wires to the wrong pins. I used the rave manual and circuit guide to find out the correct colors to pins. I wired the pins to the truck's connectors and made sure they were all secure and away from the exhaust manifolds that could melt the connectors and wires.

The codes went away for a few minutes(I did disconnect and reconnect the battery while working), and I also saw that the O2 sensor that was in that place had the wires loose in their connectors and not connecting. I bought a Bosch O2 sensor from Autozone and put that in this afternoon.

Here's where I'm at now. I still have the P0134 and P0150 codes popping up after about 2 minutes of resetting them. I have an Ultra-Gauge that is confirming this. Was pending for a bit, then confirmed trouble code.

While I tried to make sure the wiring had room to move(but not next to the exhaust manifold) could the movement of the truck be pulling the pins from the connectors? And why would the one I repaired have no activity while the other front O2 sensor have an open circuit issue?

I'm considering going to the wiring harness at the BCU and running new lines to the sensors from the color-coded leads. I'd need to go through the firewall and put a grommet in, but I can do that. Any problems that idea?

I have t checked all the fuses yet, but could one be blown from me wiring the O2 sensor wrong?

I need to get these codes gone so I can pass Utah County Emissions and register the truck. In Utah County, you can't register the vehicle if it has a SES light on, and not if it has O2 sensors throwing a code. Cold weather is about to be here and I have to work outside on the Truck, so suggestions would be appreciated!

 

This may help:

Generic OBD Error Code Details for P0134
O2 Sensor Circuit No Activity Detected
What does this mean?
OBD Code P0134refers to
This code refers to the front oxygen sensor on Bank 1. Basically the oxygen sensor is inactive. Here's why: The powertrain control module (PCM) provides a baseline voltage of about 450 mV on the oxygen sensor signal circuit. When cold, the PCM detects the the internal resistance of the sensor is high. As the sensor warms up the resistance is lowered and it starts producing voltage based on the oxygen content in the exhaust. When the PCM determines that the time it took for the sensor to warm up is greater than one minute or that the voltage is inactive (not reading outside 391-491 mV it views the sensor as inactive or open and sets the P0134 code.
Symptoms
Possible sumptoms of OBD code P0134
One or more of the following may occur: Check engine light illumination Poorly running/engine missing Blowing black smoke Poor fuel economy Dying, stuttering
Causes
Possible causes of OBD code P0134
A code P0134 may mean that one or more of the following has happened: Bad O2 (oxygen) sensor Bad heater circuit in the O2 sensor Wiring or connector to the sensor frayed / broken Blown heater circuit fuse Holes in the exhaust system PCM failure
Possible Solutions
The most common fix is to replace the oxygen sensor. But that doesn't rule out the possibility of: Rusted exhaust pipe Inspect wiring & connector(s) for problems Excessive amperage blowing heater fuse (still requires replacement of sensor but also replacement of blown fuse) Replace PCM (only as last resort after all other possibilities are covered.

 

Thanks! That helps confirm some of the suspicions that I'm having. The wiring I did may have increased resistance in the wires, tricking the ECU into thinking the resistance isn't going down because the O2 sensor is bad. What do you think about running new wiring directly to the ECU from the front 2 O2 sensors. The only trouble could be running the brown/pink wires to the connector C0449. This would be after checking all of the fuses/relays, of course. I'll check the resistance in the wiring from the ECU to the truck's pins. When I got the truck, oil was in the connector. I cleaned it out, but not with terminal cleaner. I did clean it well, though with a brass brush and then used dielectric grease in the terminals. Was the dielectric grease a bad idea?

 

The only thing I can add is that when I replaced my O2 sensors, I got a bad sensor that threw codes. I returned it to the parts store for another one and have had no problems for a year.

Do you have your old sensor? Put it back in and see if you get a different response than the new sensor.