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P2A00 2004 Toyota Highlander Code - A/F Sensor Circuit Slow Response Bank 1 Sensor 1

- Code Popularity: 3,648 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P2A00 2004 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 1 Sensor 1
  • Air fuel Ratio (A/F) Bank 1 Sensor 1 harness is open or shorted
  • Air fuel Ratio (A/F) Bank 1 Sensor 1 circuit poor electrical connection
  • Fuel pressure
  • Fuel injector
  • Intake air leaks
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How to Fix the DTC P2A00 2004 Toyota Highlander?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P2A00 2004 Toyota Highlander Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2A00 2004 Toyota Highlander code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

The P2A00 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)

Code P2A00 2004 Toyota Highlander 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 P2A00 2004 Toyota Highlander - A/F Sensor Circuit Slow Response Bank 1 Sensor 1 - AutoCodes.com
P2A00 2004 Toyota Highlander Code - A/F Sensor Circuit Slow Response Bank 1 Sensor 1

Need More Information on the Code?

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