Error codes P0135, P0300, P0302, P0303 and P0306
Error codes P0135, P0300, P0302, P0303 and P0306
![[Image: cnf8.png]](http://imageshack.us/a/img20/6554/cnf8.png)
![[Image: d6ys.png]](http://imageshack.us/a/img708/7894/d6ys.png)
I didn't panic, since it didn't really affect the engine performance, but i think the fuel consumption went up a bit.
My local spare parts store wanted £200 for a new O2 sensor, so I ordered one from Ebay and kept driving. The delivery time was around a week and I needed to use my car to get to work, so I just crossed my fingers and hoped nothing bad would happen.
A few days later I started my car to drive home from work and the CEL started flashing along with the TRC light. I read the following codes:
![[Image: t77y.png]](http://imageshack.us/a/img443/2415/t77y.png)
Also, I could feel the car wasn't running on all six cylinders. I drove it home and let it sit until I got my new O2 sensor.
I'm not sure how old O2 sensor should look, but I've got a feeling they should be a little bit cleaner than this:
![[Image: 5a9d.jpg]](http://imageshack.us/a/img820/4761/5a9d.jpg)
I replaced the sensor, reset the ECU and started the car. It was still running on five cylinders, so I checked all the spark plugs. 1-5 looked fine, but number 6 was wet and smelled petrol. I cleaned it a bit and then swapped it with the number 5 one. After putting everything back together again I turned the key and the engine was as smooth as ever :w00t:
I just thought I'd post this in case someone else experiences the same thing in the future.
P.Lindblom
10-09-2020, 07:54 AM #1A few weeks ago my IS200 got a CEL. I've got a code reader constantly plugged into my OBD-port, so I immediately checked the error code. It turned out to be P0135 - O2 Sensor Heater Circuit Bank 1 Sensor 1.
I didn't panic, since it didn't really affect the engine performance, but i think the fuel consumption went up a bit.
My local spare parts store wanted £200 for a new O2 sensor, so I ordered one from Ebay and kept driving. The delivery time was around a week and I needed to use my car to get to work, so I just crossed my fingers and hoped nothing bad would happen.
A few days later I started my car to drive home from work and the CEL started flashing along with the TRC light. I read the following codes:
Also, I could feel the car wasn't running on all six cylinders. I drove it home and let it sit until I got my new O2 sensor.
I'm not sure how old O2 sensor should look, but I've got a feeling they should be a little bit cleaner than this:
I replaced the sensor, reset the ECU and started the car. It was still running on five cylinders, so I checked all the spark plugs. 1-5 looked fine, but number 6 was wet and smelled petrol. I cleaned it a bit and then swapped it with the number 5 one. After putting everything back together again I turned the key and the engine was as smooth as ever :w00t:
I just thought I'd post this in case someone else experiences the same thing in the future.
![[Image: LexuS-Copy.jpg]](http://i65.photobucket.com/albums/h204/Sparkystav/LexuS-Copy.jpg)
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Sparkystav
10-09-2020, 09:39 AM #2Glad to hear you sorted it mate!
Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
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Ha ha ha ive had sane stuff happening to me changed the o2 sensors that worked for a day or so then gradualy started again then cleaned plugs again that helped till eventually at the weekend I found track marks down the side of a plug only slight black lines about a hairs width where it had been arching out an causing problems miss fires an from the afr guage making the lambdas run funny to
P.Lindblom
10-09-2020, 11:31 AM #6I had six unused ignition coils lying around, so I replaced them after I got the car running again. I've also ordered a set of new spark plugs, just in case.
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