Engine-Codes - Honda - P0134 Honda

P0134 Honda Code - Air/Fuel Ratio Sensor 1 Heater System Malfunction

- Code Popularity: 83,174 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
Table of contents
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What are the Possible Causes of the DTC P0134 Honda?

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) Sensor (Sensor 1)
  • A/F Sensor (Sensor 1) harness is open or shorted
  • A/F Sensor (Sensor 1) circuit poor electrical connection

Code Tech Notes

For the following Honda models:

2003-2005 Honda Accord V6s
2005 Honda Odysseys
2005 Honda Pilots
2006 Honda Ridgelines
To fix this problem, check the sensor wiring and connections for damage. If the sensor circuit is OK, and the DTC(s) come back after clearing them and doing a short test-drive, replace the A/F sensor. The replacement A/F sensors in Honda parts stock are an improved version over the original sensor.

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How to Fix the DTC P0134 Honda?

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 P0134 Honda 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.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

What Does the P0134 Honda Code Mean?

The Air/Fuel Ratio (A/F) Sensor (Sensor 1) is activated by warming the element with a heater and by maintaining a steady high temperature to accurately calculate the air/fuel ratio. If the heater does not properly heat the element, the A/F Sensor (Sensor 1) does not activate, and the exhaust emissions deteriorate. The Powertrain Control Module (PCM) monitors the A/F Sensor (Sensor 1) internal resistance.
1. When the A/F Sensor (Sensor 1) does not activate for a set time after the A/F sensor (sensor 1) heater is turned on (with high A/F Sensor (Sensor 1) internal resistance), a malfunction of the A/F sensor (sensor 1) heater is detected, and a Diagnostic Trouble Code (DTC) is stored.
2. When the A/F Sensor (Sensor 1) heater cycles ON and OFF for a set time, and the resistance remains high when the heater is ON, a malfunction of the A/F Sensor (Sensor 1) heater is detected, and a DTC is stored.

P0134 Honda Code - Air/Fuel Ratio Sensor 1 Heater System Malfunction

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