P1135 Toyota RAV4 Code - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1
Quick Answer
The P1135 diagnostic trouble code (DTC) for a Toyota RAV4 indicates a malfunction in the Air/Fuel Ratio Sensor Heater Circuit for Bank 1 Sensor 1. Common causes include Faulty Air/Fuel Ratio Sensor, Damaged wiring or connectors in the sensor circuit, Blown fuse related to the sensor heater circuit. 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
- P1135 Toyota RAV4 indicates Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1.
- Common causes
- Common causes include Faulty Air/Fuel Ratio Sensor, Damaged wiring or connectors in the sensor circuit, Blown fuse related to the sensor heater circuit.
- 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.
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Code P1135 Toyota RAV4 Description
The P1135 diagnostic trouble code (DTC) for a Toyota RAV4 indicates a malfunction in the Air/Fuel Ratio Sensor Heater Circuit for Bank 1 Sensor 1. This sensor is responsible for monitoring the air-fuel mixture in the exhaust system and sending this information to the engine control module (ECM). The heater circuit in the sensor is designed to reach operating temperature quickly to provide accurate readings. When the ECM detects a fault in this circuit, it triggers the P1135 code. This can lead to incorrect air-fuel mixture readings, affecting engine performance, fuel efficiency, and emissions control.
Common Causes of P1135 Toyota RAV4
- Faulty Air/Fuel Ratio Sensor
- Damaged wiring or connectors in the sensor circuit
- Blown fuse related to the sensor heater circuit
- ECM software or hardware issues
- Extreme temperatures causing sensor malfunction
Symptoms of P1135 Toyota RAV4
- Decreased fuel efficiency
- Rough idling or stalling
- Engine misfires
- Check Engine Light illuminated
- Poor acceleration or engine performance
How to Fix P1135 Toyota RAV4
- Diagnose the issue using an OBD-II scanner to confirm the P1135 code and identify the specific sensor involved.
- Inspect the sensor wiring and connectors for any damage or corrosion, repairing or replacing as needed.
- Test the sensor heater circuit for continuity and resistance, replacing the sensor if it fails these tests.
- Check and replace any blown fuses related to the sensor heater circuit.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
Cost to Fix P1135 Toyota RAV4
The cost of repairing a P1135 code on a Toyota RAV4 can vary depending on the cause of the issue and the specific sensor that needs to be replaced. On average, the parts cost for a new Air/Fuel Ratio Sensor can range from $100 to $300, while labor costs may range from $100 to $200. This brings the total estimated repair cost to approximately $200 to $500. However, it's important to note that labor rates and part prices can vary significantly based on location, the repair shop's rates, and the vehicle's make and model. It's recommended to obtain quotes from multiple shops to ensure a fair price for the repair.
When is the Code Detected?
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Frequently Asked Questions about P1135 Toyota RAV4 Code
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Discuss the causes and fixes for P1135 Toyota RAV4 OBDII Code
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Here's one for the books. Have a P1155 code, which should be an open heater on B2S1. Well on the mid year 2001 they made changes to the car and started adding 2002 parts, like the heater assy in the car, only one many things I have found. Well the code P1155 on these cars is really the B1S1 O2 sensor. Checked by ohming out the 2 blacks wires to confirm. Toyota in 2003 apparently sent out letters to have you come in and get ECM reprogrammed, I never got the letter. So 250 dollars later, still have the problem, ( insert all pertenant explitives here), so if your Rav4 is within the time frame, check the ohms on the black wires, if good should be between 1.1 to 2.2 oms when cold, if bad it will show open. Toyota the new Ford
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