For Shop Owners

P1150 LEXUS - Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction Bank 2 Sensor 1

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • Faulty Air fuel Ratio (A/F) Bank 2 Sensor 1
  • Air fuel Ratio (A/F) Bank 2 Sensor 1 harness is open or shorted
  • Air fuel Ratio (A/F) Bank 2 Sensor 1 circuit poor electrical connection
  • Fuel pressure
  • Fuel injector
  • Intake air leaks
What does this mean?

When is the code detected?

The 1150 code is set when A/F sensor output voltage change value is not what the Engine Control Module (ECM) is expecting.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1150 LEXUS Description

The Air-Fuel ratio (A/F) sensor varies its output voltage in proportion to the air-fuel ratio. Based on the output voltage, the Engine Control Module (ECM) determines if the air-fuel ratio is RICH or LEAN and adjusts the stoichiometric air-fuel ratio. The ECM also checks the fuel injection volume compensation value to check if the A/F sensor is deteriorating or not. A/F sensor response deterioration is determined by the ratio of the A/F sensor output voltage variation and fuel trim variation.
OBDII Code P1150 Lexus - Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction Bank 2 Sensor 1 -

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P1150 LEXUS Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P1150 Lexus code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 2
1=Easy 2=Moderate 3=Hard

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