mtparker18

What are the following codes?

P0057
P0134
P0154

If I remember correctly, it's for the o2 sensors. But which sensors?


Thanks, and sorry for the stupid quesiton

Debonair

Not a stupid question. But you can search before posting and be proactive at learning from all the information already on CL rather then just starting a new thread. I am 99% sure you can find definitions, common fixes, and diagrams on all three of these codes on previous posts if you go looking for them.

mtparker18

I didnt get a chance to search because I posted quick at work. Biggest thing I have a problem is, is finding out which sensor the code is for (ex. Bank 2 sensor 2). If you catch my drift.

mtparker18

Okay, after research, I've come up with this;

P0057 = Midpipe O2
P0134 = Bank 1 sensor 1
P0154 = bank 2 sensor 1

I really want to make sure I have the right o2 sensors that I'm going to replace.



Are these the right o2 sensors I have marked?

mtparker18

Can anyone confirm the o2 sensor locations? I really need to get my car back in running order...

DeanGS

iTrader: (8)

Yes, those are the correct sensors. The midpipe code is for the heater circuit. The other two codes are for no activity from the O2 sensor.

mtparker18

Alright, so I guessing I'm going to have to replace my B1S1 and B2S1 o2s. and for the B2S2 and midpipe o2, I'll just run a sim on them

DeanGS

iTrader: (8)

Unless you are running a header (cat delete) there is no reason to run a sim on the secondary sensors. The sim will not cure the problem though because the heater circuit will still throw the code. If you run a sim you must run a ~10ohm, 20 watt resistor across the heater circuit wires on each of the sensor connectors. If you are running a header you are better off installing spark plug non-foulers in the secondary sensor holes and screwing the sensors into the non-foulers. This moves the sensors out of the exhaust stream and will take care of all the secondary O2 sensor codes (assuming that the sensors are good). The primary sensors are needed to trim the fuel map and if they are bad, in addition to throwing a code(s), they will typically hurt mileage and performance.

mtparker18

I am running headers with no cats. Is there any way to check and see if the sensors are bad?

DeanGS

iTrader: (8)

http://www.youtube.com/watch?v=1mb4VmDd0ao

Clear2Cloz

i posted a thread on this last week with ALL lexus specific AND generic CEL codes

https://www.clublexus.com/forums/gs-...cel-codes.html