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P0135 Honda Code - Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction

- Code Popularity: 260,959 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0135 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
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How to Fix the DTC P0135 Honda?

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.

Code Tech Notes

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it takes the sensor to warm up and start sending an adequate signal. The code is triggered when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can cause the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the sensor and connector are OK, replacing the O2 Sensor 1 usually takes care of the problem.





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0135 Honda 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.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Higher fuel consumption

Code P0135 Honda Description

A heater for the sensor element is embedded in the Air/Fuel Ratio (A/F) Sensor (Sensor 1), and it is controlled by the Powertrain Control Module (PCM). It is activated and heats the sensor to stabilize and speed up the detection of oxygen content when the exhaust gas temperature is cold. The PCM monitors the A/F Sensor (Sensor 1) heater output (return check). If the return signals do not meet the command value (for heater activation) for a set time, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0135 Honda - Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction - AutoCodes.com
P0135 Honda Code - Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction

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Code P0135 Honda comments

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