I got an SES light, had it checked out and it said Bank 1 Sensor 2. This corresponds to the driver side O2 sensor behind the cats. Well, I replaced the O2 sensor, had the trouble code deleted and I still get the same SES light warning. "low voltage" from the same sensor.

anyone have an idea of whats going on?

 

More than 1 code for this sensor. Post catalytic o2's monitor cat's effeciency. Need code # to begin to determine were to start. = o2, heater ckt. cat's etc. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />

 

Moving to Computer & Diagnostics.

 

Heres the code that was read by the guys at a local auto parts store with an OBD2 reader:

P0137 Bank 1 Sensor 2

thanks

 

Pcm sees b1s2 as inactive, check for exhaust leak upstream that o2, or a bad converter. The other possibilitys are sensor ckt. , pwr. & grds. & pcm itself. Having a scan tool with real time data pid's is a must if you want to take this on yourself. + you'll need the diagnostic trobleshooting chart too . GOOD LUCK !

 

will it help any if i mention that the Ses light comes on then turns off a day or so later than comes on again a couple of days after that? Is the computer relearning or something?

an exhaust leak is a possiblity especially since I scrape the yipe due to the G2 springs. How does one check for a leak?

TIA

 

Get under car listen and try to feel if any exhaust is escaping .But your problem does not sound so simple this is a unmoddified exhaust, & motor right? you are gonna need some diagnostic tools & skills to figure this out. Maybe you have a shop you can trust you can go to ?

 

I guess I should include my mods. Stock internals, cut out, lid, suspension

 

P0137 Heated Oxygen Sensor (HO2S) Circuit Low Voltage Sensor 2

Circuit Description:

The PCM supplies a voltage of about 450 mV between the HO2S high and low signal circuits. The oxygen sensor varies the voltage over a range from about 1,000 mV when the exhaust is rich, down through about 10 mV when the exhaust is lean.

The PCM monitors and stores the heated oxygen sensor (HO2S) voltage information. The PCM evaluates the HO2S voltage samples in order to determine the amount of time the HO2S voltage was out of range. The PCM compares the stored HO2S voltage samples taken within each sample period and determines if majority of the samples are out of the operating range.

The PCM monitors the HO2S voltage for being fixed below a predetermined voltage. If the PCM detects the voltage is below a predetermined voltage, this DTC sets.

Will email you the rest - good luck!