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1MZ-FE Codes: P1150, P1153, P1155. Which sensor needs to be changed?
I am helping a friend diagnose his 1MZ-FE (3.0L V6)-equipped 1999 Solara. I tried the Solara-specific forum without much of a response. He pulled the following codes:
In looking at that diagram, it looks like Bank 2, Sensor 1 would the the front bank, pre-cat sensor. Since the diagram actually show that it is a sensor before the precat (making it a pre-precat O2, I suppose) I think that that is the wideband O2, correct?
I did searches and saw some info that indicated that there was a difference in what the codes meant if you had a cali v. a fed spec, but those were in different (non camry/solary) child forums, so I assume that they do not necessarily apply here. Based on the VIN, he has a Cali spec, if that matters.
So the take-home questions are:
Am I correct on which O2 sensor location (front bank pre-precat) this is?
Is this a wideband (A/F-type) O2?
Does anyone have an OEM P/N or even a universal-fit P/N? I don't mind splicing and using heatshrink, if it will save him $50-60.
im sure that it's one of the o2 sensors but to be safe i would replace both. there was a time when we had diagnosed a car which read the same bank and sensor that it turned out to be a injector problem. good luck!
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I've change the O2 sensor once and it costs ~170 for CA-spec (sorry about it). My guess is with an OEM sensor you'll get the same kind of error again. Most likely the front sensor fails.
I've change the O2 sensor once and it costs ~170 for CA-spec (sorry about it). My guess is with an OEM sensor you'll get the same kind of error again. Most likely the front sensor fails.
Was that one of the ones in the manifolds, or the one after the main cat?
and the sensor after the cat is also an o2 sensor.
No, both sensors before the catalytic converter are AF sensors. They both serve the same purpose, so it wouldn't make sense for them to be different types of sensors.
Quote:
Originally Posted by phenryiv1
In looking at that diagram, it looks like Bank 2, Sensor 1 would the the front bank, pre-cat sensor.
Yeah, on that engine the front three cylinders are bank 2. For future reference, an easy way to figure out which bank is which is by following the intake headers. Cylinder #1 is always in bank 1, so follow the first intake runner and see which side of the engine it goes to. That's bank 1.
I'd also say that these three codes most definitely point towards that particular sensor, it's not responding in any way. And, it is a particular type, not just your run of the mill o2 sensor. I have never had much luck with after market AF sensors, but it has been a few years since I put one on a car. Your best bet would be to call a dealer, get the right part # based on the VIN, then hunt the net and see what's compatible. Post if you need a hand.
No, both sensors before the catalytic converter are AF sensors. They both serve the same purpose, so it wouldn't make sense for them to be different types of sensors.
Yeah, on that engine the front three cylinders are bank 2. For future reference, an easy way to figure out which bank is which is by following the intake headers. Cylinder #1 is always in bank 1, so follow the first intake runner and see which side of the engine it goes to. That's bank 1.
I'd also say that these three codes most definitely point towards that particular sensor, it's not responding in any way. And, it is a particular type, not just your run of the mill o2 sensor. I have never had much luck with after market AF sensors, but it has been a few years since I put one on a car. Your best bet would be to call a dealer, get the right part # based on the VIN, then hunt the net and see what's compatible. Post if you need a hand.
Toyota told me, that the rear sensor is a O2 sensor, and the FRONT is a A/F sensor.
Toyota told me, that the rear sensor is a O2 sensor, and the FRONT is a A/F sensor.
Whoever told you that was misinformed or they weren't clear. The front sensors (in front of the cat)are the same type, air/fuel ratio sensors (the new expensive type). They monitor the fuel mixture based on exhaust gasses from the cylinders and report back to the ECU to make any necessary adjustments. The sensor behind the catalytic converter is there only to monitor the efficiency of the cat, and is the old o2 sensor style. When they told you the front sensor is the AF type and the rear is an o2, they probably meant infront/behind the catalytic converter, not the front or back of the engine.
Whoever told you that was misinformed or they weren't clear. The front sensors (in front of the cat)are the same type, air/fuel ratio sensors (the new expensive type). They monitor the fuel mixture based on exhaust gasses from the cylinders and report back to the ECU to make any necessary adjustments. The sensor behind the catalytic converter is there only to monitor the efficiency of the cat, and is the old o2 sensor style. When they told you the front sensor is the AF type and the rear is an o2, they probably meant infront/behind the catalytic converter, not the front or back of the engine.
yes, im very sorry i posted that information, i was misinformed and found out today when i contacted Toyota agian. Both of the Sensors (bank 1 sensor 1 and Bank 2 Sensor 1) are A/F Sensors.
Thanx for correcting me, otherwise i woulda just drove around with the o2 in there, had i failed to check with Toyota agian.
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1MZ-FE Codes: P1150, P1153, P1155. Which sensor needs to be changed?
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