P1155 Lexus 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 Lexus 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 Lexus 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 Lexus?
- 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 Lexus?
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 Lexus 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 Lexus Code
1. What are the common symptoms of OBDII code P1155 in a Lexus related to the Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1?
- Common symptoms include poor fuel economy, rough idling, engine hesitation, and illuminated check engine light.
2. What are the possible causes of the P1155 code in a Lexus?
- The code can be triggered by a faulty air/fuel ratio sensor, damaged wiring or connectors, a blown fuse, or issues with the sensor heater circuit.
3. How can I diagnose the Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1 issue in my Lexus?
- Diagnosis involves using an OBDII scanner to retrieve the fault code, visually inspecting the sensor and its connections, and testing the sensor heater circuit for continuity.
4. Can I still drive my Lexus with the P1155 code present?
- It is not recommended to drive with the P1155 code as it can lead to reduced fuel efficiency and potential engine damage over time.
5. How do I repair the Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1 issue in my Lexus?
- Repair options include replacing the faulty sensor, repairing damaged wiring or connectors, checking and replacing fuses if needed, and clearing the error code with an OBDII scanner.
6. Is it possible to reset the P1155 code in a Lexus without fixing the underlying issue?
- While you can clear the code temporarily using an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reappearing.
7. How much does it typically cost to repair the P1155 code related to the Air/Fuel Ratio Sensor Heater Circuit in a Lexus?
- Repair costs can vary depending on the specific issue, but replacing the sensor or repairing wiring may cost anywhere from $200 to $500 at a repair shop.
8. Can a DIY enthusiast fix the P1155 code issue in a Lexus?
- DIY enthusiasts with automotive repair experience can attempt to fix the issue by following repair guides, but it is recommended to have the proper tools and knowledge to avoid complications.
9. Will the P1155 code cause my Lexus to fail an emissions test?
- Yes, the P1155 code can cause your Lexus to fail an emissions test due to the impact on the air/fuel ratio and emissions control systems.
10. How often does the Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1 issue occur in Lexus vehicles?
- While relatively uncommon, the P1155 code can still occur in Lexus vehicles due to sensor or circuit failures, especially in older or high-mileage cars.
Discuss the causes and fixes for P1155 Lexus OBDII Code
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The possible locations and the descriptions are very helpful so we dont buy sensors we dont need.
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