hksimpson

A little while ago I posted the codes I read from my RX300 and at that time I read and cleared the codes and cleaned the MAF:

https://www.clublexus.com/forums/sho...d.php?t=228573

I had the P0171 Bank 1 Sensor 1 that pointed to an oxygen sensor. I was waiting until payday or order a new oxygen sensor and before placing my order, I read the codes again because the CEL lite came back on. Now I don't see the Bank 1 Sensor 1 and instead see this:

P0125 Insufficient coolant temperature
P1135 Fuel Air Metering
P1130 Fuel Air Metering
P1133 Fuel Air Metering
P1135 Fuel Air Metering (the P1135 code is in there twice)

I cleared the codes again and the same five came back but nothing about the oxygen sensor.

Ideas?

Tammy

Search this forum on the P codes you have...

You may find the symptoms have not changed for the inner O2 sensor. And the codes aren't just "air fuel metering" errors... you'll discover.

The MAF may be defective, I would replace the O2 sensor with a Denso unit first.

Lexmex

That's right Tammy, even thought the bank and sensor is not shown, the O2 sensor (ones before the cat), can still be at fault. About the only other thing wrong can be some connections with the sensors, MAF itself even after cleaned (possible) or the ECM (not likely as other things would be messed up).

I went over these codes again in the manual just to make sure, and the most likely culprit is still that O2 sensor before the cat.

hksimpson

Once again you two, thanks!

I figure since I am doing my own work I can afford to buy the stuff I need and a little more just to be safe. I purchased a new OEM MAF for $30 today and will probably just replace both O2 sensors while I am an it this week.

Thanks

Nightsky

Did this fix your issue? My wifes RX300 just got an 1133 this week. Need to track it down to "bad gas" or a bad sensor I'm hoping.

Mike