unitedwestang

A few weeks ago I ordered the SF4 tuner for my '04 GT from AM. Modifications currently are K&N CAI, Hooker long tube headers, BBK catted x-pipe, Flowmaster catback, and 3.73 gears. Prior to the tune codes I was receiving was P0060 and P0153. I do know I have a bad rear O2 sensor because after doing some live data logging I’m getting 0.000V output from the driver’s rear O2 sensor--accounting for the P0060. For this reason I asked for the rear O2 sensors to be turned off in the tune. I had figured the P0153 was attributed to the long tube headers. I am now running the 93 octane race tune--fantastic performance by the way. Everything was great for probably around 20 miles or so then the SES light came back on. I checked the codes with the scanner and P0153 still remains along with P1000 now. Reading on here sounds like the P1000 is caused by turning the rear O2 sensors off, not allowing the full drive cycle to run--but this code alone shouldn't trigger the SES (so I've read). Where I live I do not have emissions, so I'm not so worried with that code. However, the P0153 still remains. Any ideas what could be causing this still?

dawson1112

P0153 indicates Bank2, Sensor1 or the upstream 02 sensor on bank 2 This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.

•Check and fix any exhaust leaks
•Check for wiring problems (shorted, frayed wires)
•Check the frequency and amplitude of the oxygen sensor (advanced)
•Check for a deteriorating / contaminated oxygen sensor, replace if necessary
•Check for inlet air leaks
•Check the MAF sensor for proper operation
•Replace the Bank 2 oxygen sensor upstream of the catalytic converter

unitedwestang

My first thought is to swap passenger and driver front O2 sensors and see if the code follows it.
Do you know what the maximum output voltage of the O2 sensor is? I have a data aquisition board with an oscilloscope. What frequency and amplitude should I expect under certain conditions?

unitedwestang

Also emailed Bama asking basically the same thing. They sent me a revised 93 Octane Race tune (in only about one day, props to them). So I'll try that out first and see how it goes. Then I will look into the above mentioned suggestions.

ESABATM

As posted earlier it does sounds like a lazy 02 sensor. How many miles on the car?

unitedwestang

Its got about 75,xxx miles.
Now that I think about it, it really wouldn't surprise me if it was going out because that rear one is already bad, and if I remember correctly I think it looks like one had already been replaced at some point last time I was under there. I think I'll still upload the revised tune to see if that does it. If not I'll swap sides with the front sensors just to verify its the sensor, because d@mn those guys are expensive.