O2 Sensor Circuit Wiring Diagram (2003-2007 2.4L Honda Accord)

APPLIES TO: This oxygen sensor circuit wiring diagram applies to the following vehicles:

• 2.4L Honda Accord: 2003, 2004, 2005, 2006, 2007.

This fuel pump circuit wiring diagram includes the following circuits:

• PGM-FI Main Relay 1.
• Air/Fuel Ratio Relay.
• Air/Fuel Ratio Sensor.
• Oxygen Sensor 2. This O2 sensor is also called:
  • Rear O2 sensor.
  • Downstream O2 sensor.
  • Post-converter O2 sensor.

O2 SENSOR TESTS: The rear O2 sensor test is explained step-by-step here:

• Rear Oxygen Sensor Performance Tests (2003-2007 2.4L Honda Accord).
• P0137 Diagnostic Tests -Rear O2 Sensor (2003-2007 2.4L Honda Accord).
• P0138 Diagnostic Tests -Rear O2 Sensor (2003-2007 2.4L Honda Accord).
• P0141 Diagnostic -Rear O2 Sensor Heater Tests (2003-2007 2.4L Honda Accord).
• P0420 Diagnostic -Catalytic Converter Tests (2003-2007 2.4L Honda Accord).

More 2.4L Honda Accord Test Tutorials

You can find a complete list of 2.4L Honda Accord wiring diagrams and diagnostic tutorials in this index:

• 2.4L Honda Accord Index Of Articles.

Here's a sample of the tutorials you'll find there:

• How To Test Misfire Trouble Codes (2003-2006 2.4L Honda Accord).
• How To Test The Engine Compression (2003-2006 2.4L Honda Accord).
• How To Test The Fuel Injectors (2003-2006 2.4L Honda Accord).
• How To Test The Fuel Pump (2003-2007 2.4L Honda Accord).