P1135 Scion Code - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1
Quick Answer
The P1135 code for Scion vehicles 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, Failed ECM. 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 Scion 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, Failed ECM.
- 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 Scion Description
The P1135 code for Scion vehicles indicates a malfunction in the air/fuel ratio sensor heater circuit for Bank 1 Sensor 1. This sensor is responsible for monitoring the oxygen content in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air/fuel mixture for optimal combustion. The heater circuit within the sensor helps it reach operating temperature quickly for accurate readings.
Common Causes of P1135 Scion
- Faulty air/fuel ratio sensor
- Damaged wiring or connectors in the sensor circuit
- Failed ECM
- Corrosion or contamination in the sensor connector
- Electrical issues such as a blown fuse or relay
Symptoms of P1135 Scion
- Decreased fuel efficiency
- Rough idling or stalling
- Engine misfires
- Check Engine Light illuminated
- Reduced engine performance
How to Fix P1135 Scion
- Start by diagnosing the issue with a scan tool to confirm the P1135 code and check for any related codes.
- Inspect the wiring and connectors for signs of damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the air/fuel ratio sensor using a multimeter to check for proper resistance and voltage readings. Replace the sensor if it fails the test.
- Check the heater circuit for continuity and proper voltage supply. Repair any issues found.
- Clear the code with a scan tool and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1135 Scion
The cost of repairing a P1135 code on a Scion can vary depending on the specific cause of the issue. On average, the parts for an air/fuel ratio sensor replacement can range from $100 to $300, while labor costs can add another $100 to $200. Overall, the total repair cost may fall between $200 and $500, but it's essential to consult with a local auto repair shop for a more accurate estimate based on the vehicle's make and model, as well as any additional issues that may be present.
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