wculbert

I have a 2006 IS 350 that I bought new. It has certainly had a few issues over the years (!), and now, with 125,000 miles , the "Check VSC", "Check Engine", and "Slip Indicator" light have been going off and on for a few weeks. I am seeing 2 malfunction codes: P0158 ( Oxygen Sensor) and P0606 ( ECM/ECP Processor). Honestly, I don't really care about the emissions, and I certainly am not going to spend $2000 to replace the ECM Processor. My question: is it possible to disable the lights ( or another way not to keep pouring $$ into this car) so I don't have to live with this annoying "Christmas tree" dash panel?!
Thanks in advance for your help and advice!
W

jr4div2

This may sound like a long shot, but go get your charging system and battery checked. When voltage starts drooping in the vehicles, strange codes start flying about.

Gville350

iTrader: (10)

Replace your driver's side downstream O2 sensor, and that will remove BOTH CELs. A good Denso O2 sensor will run you about $70 shipped.

P0158 O2 Sensor Circuit High B2S2 (O2 Sensor Circuit High Voltage (Bank 2 Sensor 2) -

This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model. The catalytic converter is used to lower harmful emissions. To ensure proper operation, there is an O2 sensor located behind the catalyst that monitors the oxygen content of the exhaust after the cat. The PCM (Powertrain Control Module) then compares the post-cat reading to the pre-cat readings to determine if the catalyst is working properly.

A P0158 refers to a fault at the post-cat o2 sensor on bank 2 (second sensor back on bank 2), indicating that the signal voltage is too high. The o2 sensor is a four wire sensor. Two wires are dedicated to the heating element and two wires are dedicated to the sensor. The heating element should have battery voltage on one wire with key on engine off and ground should be present on the other. The PCM supplies a reference voltage of 0.5 volts to the o2 sensor which the sensor varies according to oxygen content in the exhaust. The PCM also supplies a ground to the sensor. Changes in oxygen content cause resistance changes in the o2 sensor. This change in resistance affects the PCM-supplied 0.5 volts. It is capable of varying between approximately 0.1 and 0.9 volts. A reading of 0.1 indicates full lean and 0.9 indicates full rich. This variance in the voltage is monitored by the PCM. A P0158 code means that the voltage was higher than normal on the signal circuit. NOTE: A post-catalyst o2 sensor will normally switch slower and fewer times than front (pre-cat) o2 sensors.

wculbert

Thanks Gville. My car was the first 2nd Gen IS sold in Greenville. Just FYI.

WORKD250

iTrader: (1)

agreed and worth a shot. battery was slowly dying and would throw the check engine vsc ect.. after driving it for 15 mins.. swapped my battery and they never came back

Gville350

iTrader: (10)

Cool! I had to fly into NJ to find a recent used IS350 at a good price. Prices in SC are insane for these things! LOL!

You still in town? Hit me up with a PM if you'd like.