mydakrri

iTrader: (1)

Hi forum,

I did many searches and have not come up with an answer to my code issues. My check engine light came on, 2003 ES300 120,000 miles on it, and AutoZone said they are codes P2238 and P0031. He thought maybe one of the 02 sensor and/or the AF sensor. I took the Air Flow sensor off and cleaned it and put a new air filter in. The light is still on.

Sometimes it will be off in the morning and then 10-miles down the road it goes on.

Any thoughts?

Thanks

Dakrri

mydakrri

iTrader: (1)

I found out what P0031 code is. Can someone please tell me where the 02 Sensor is located on a 2003 ES 300???

Thanks


http://www.obd-codes.com/trouble_codes/



P0031 - Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)
OBD-II Trouble Code Technical DescriptionOxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)

This O2 sensor #1 may also be refered to as an air/fuel ratio sensor since on some vehicles it is. It detects the amount of oxygen in the exhaust gas compared to the outside air and then vehicle's computer adjusts the air/fuel ratio going into the engine. The sensor is less effective when the exhaust gas temperature is low, so it includes a heater which is activated to help get better readings from the A/F O2 sensor. Essentially this P0031 code means that the resistance of the heater circuit is lower than normal. In most cases, that resistance level must fall below 0.8 A to trigger the DTC code.