P1155 Toyota RAV4 Code - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1
Quick Answer
Air-Fuel Ratio (A/F)sensor need to reach a minimum operating temperature of 1200 degrees F to produce an accurate voltage signal. Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1155 Toyota RAV4 indicates Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1.
- Common causes
- Common causes include 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.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1155 Toyota RAV4 Description
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.
What are the Possible Causes of the DTC P1155 Toyota RAV4?
- 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 to Fix the DTC P1155 Toyota RAV4?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1155 Toyota RAV4 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1155 Toyota RAV4 Code
1. What are the common symptoms of OBDII code P1155 in a Toyota RAV4?
- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the check engine light.
2. What does the OBDII code P1155 on a Toyota RAV4 indicate?
- The code P1155 indicates a malfunction in the Air/Fuel Ratio Sensor Heater Circuit for Bank 2 Sensor 1.
3. What are some possible causes of the Air/Fuel Ratio Sensor Heater Circuit malfunction in a Toyota RAV4?
- Potential causes include a faulty air/fuel ratio sensor, damaged wiring or connectors, a blown fuse, or issues with the engine control module (ECM).
4. How can I diagnose the cause of the P1155 code in my Toyota RAV4?
- Diagnosing the issue may involve checking the sensor's wiring and connectors for damage, testing the sensor's resistance, and verifying the operation of the heater circuit.
5. Can I drive my Toyota RAV4 with the P1155 code present?
- It is generally not recommended to drive your vehicle with the P1155 code active, as it can lead to decreased fuel efficiency and potential engine performance issues.
6. How can I repair the Air/Fuel Ratio Sensor Heater Circuit malfunction in my Toyota RAV4?
- Repair may involve replacing the air/fuel ratio sensor, repairing any damaged wiring or connectors, checking and replacing any blown fuses, or reprogramming the ECM.
7. Will resetting the check engine light resolve the P1155 code in my Toyota RAV4?
- Resetting the check engine light may temporarily clear the code, but it will likely return if the underlying issue causing the P1155 code is not addressed.
8. Are there any maintenance tips to prevent the recurrence of the P1155 code in my Toyota RAV4?
- Regularly inspecting and maintaining the air/fuel ratio sensor, checking for wiring issues, and addressing any engine performance concerns promptly can help prevent the P1155 code from recurring.
9. Is it possible to clear the P1155 code on a Toyota RAV4 without repairing the issue?
- While it is possible to clear the code using an OBDII scanner, it is important to address the underlying problem to prevent potential damage to the vehicle and ensure proper operation.
10. Can a DIY enthusiast repair the Air/Fuel Ratio Sensor Heater Circuit malfunction in a Toyota RAV4?
- Depending on your mechanical aptitude and access to tools, it may be possible to diagnose and repair the issue yourself. However, if you are unsure, it is recommended to seek professional assistance to avoid further complications.
Discuss the causes and fixes for P1155 Toyota RAV4 OBDII Code
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Is the hater sensor P0161 bank2 sensor2 located on the right side facing front of Toyota Rav
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I am very change the censor and still light come up engine light how I can fix that.
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