AF Sensor code p1153

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Old 30 Jun 2015, 08:58 am   #1 (permalink)
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Cool AF Sensor code p1153

I have a 1999 es300 with a p1153 code. I replaced the Bank 2 Sensor 1 AF Sensor ( front one) and still showing CEL and rough idle. The code says it can be fuel pump, injector issue, vacuum leak, and or failed sensor. If not a failed sensor, and fuel pump must be working as it runs, then fuel pressure regulator, vacuum leak, or injector problem may be it. How do I test to rule out vacuum leak, or pressure regulator? I replaced the Bank 1 Sensor 1 a few months ago so assuming that has not failed again.
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