Code P1150 1999 Toyota Avalon V6 1mz-fe California

edge

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#1
Make
Toyota
Model
Avalon - california
Year
1999
Miles
32000
Engine
1mz-fe
This Avalon has a P1150 code, which is a Bank 2, Sensor 1 (A/F) sensor. I have heard these sensors are trouble prone. Is there a way to confirm the A/F sensor is the problem, such as fuel system bank 2 and fuel trim on bank 2 ? I/M readiness shows o2 sensors are OK (?)
Freeze Frame Data
Fuel Sys1 CL
Fuel Sys2 OL-Drive
Load_PCT% 28.2
ETC 156
SHRTFT1 -1.6
LONGFT1 -3.1
SHRTFT2 0
LONGFT1 -2.3
RPM 1486
VSS 43
LAT 86

I/M Readiness
All systems OK including O2 sensors. (This vehicle has A/F sensor)
 
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#2
these sensors are not a problem. The use of aftermarket, not from toyota will be problematic.
Must us a toyota part!!!

There is a low ECT in above snapshot. Critical to reach temp for your Calif emission package.
Fuel trims are looking fine , a + number BUT low and far from the +10 where we would worrry.
Might look in freeze frame for a clue.
But will need to read sensor voltages to confirm sensor operation.
 

edge

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I would always use Toyota or Denso if they are still OE. B1S1 was replaced 10 yrs ago with a Denso, which claimed to be OE. I don't know if that is still the case today.

The engine was run for no more than 5 minutes up a hill, I don't know if that affects the ECT.

Do I need a live stream scan tool to read the A/F sensor voltage output ? I think the A/F heater can be ohm checked.
 
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#4
Yes the A/F heater can be ohm checked, this is a spec that aftermarket fails to maintain. But after 10yrs I would just continuity check. PCM's been happy that long.

Do not have time to pull up the spec right now,
 

grcauto

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#5
We find it easier and a better test is to capture the current flow for the heaters.