P1155 TOYOTA RAV4 2.0 - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1
P1155 TOYOTA RAV4 2.0 Possible Causes
- Faulty Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1
- Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 harness is open or shorted
- Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How is the P1155 TOYOTA RAV4 2.0 code repair?Start by checking 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's pins.
What is the cost to diagnose the P1155 TOYOTA RAV4 2.0 code
Labor: 1.0The cost to diagnose the P1155 TOYOTA RAV4 2.0 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected?The P1155 is set when the Engine Control Module (ECM) detects a heated oxygen sensor heater circuit malfunction
- Engine Light ON (or Service Engine Soon Warning Light)
P1155 TOYOTA RAV4 2.0 MeaningAir-Fuel Ratio (A/F)sensor need to reach a minimum operating temperature of 1200 degrees F to produce an accurate voltage signal. The faster the air-fuel ratio 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 air-fuel ratio sensor. The ECM controls the air-fuel ratio 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.
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