Engine-Codes - Toyota - P2A03 2002 Toyota Highlander

P2A03 2002 Toyota Highlander Code - A/F Sensor Circuit Slow Response Bank 2 Sensor 1

- Code Popularity: 3,402 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P2A03 2002 Toyota Highlander?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other 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
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How to Fix the DTC P2A03 2002 Toyota Highlander?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P2A03 2002 Toyota Highlander code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

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.

What are Code Possible Symptoms?

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

What Does the P2A03 2002 Toyota Highlander Code Mean?

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.

P2A03 2002 Toyota Highlander Code - A/F Sensor Circuit Slow Response Bank 2 Sensor 1

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