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P0135 1999 Toyota Camry Code - Heated Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 1

- Code Popularity: 11,597 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0135 1999 Toyota Camry?

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 Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
  • Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
  • Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground
  • Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC P0135 1999 Toyota Camry?

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 take 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 caused 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 1999 Toyota Camry 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?

Current amperage in the front heated oxygen sensor heater circuit is out of the normal range. (An improper voltage drop signal is sent to ECM through the front heated oxygen sensor heat

What are Code Possible Symptoms?

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

Code P0135 1999 Toyota Camry Description

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
OBDII Code P0135 1999 Toyota Camry - Heated Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 1 - AutoCodes.com
P0135 1999 Toyota Camry Code - Heated Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 1

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