OBDII Code List

P2A03 2009 TOYOTA CAMRY - A/F Sensor Circuit Slow Response Bank 2 Sensor 1

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
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Possible causes

  • Faulty Air fuel Ratio (A/F) Bank 2 Sensor 1
  • EFI Relay
  • 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

When is the code detected?

The P2A03 Code is set when A/F sensor output voltage change value is below regular value against fuel trim change value.

Possible symptoms

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

P2a03 2009 Toyota Camry 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 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 P2a03 2009 Toyota Camry - A/F Sensor Circuit Slow Response Bank 2 Sensor 1 -

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