P1135 Code - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1
Quick Answer
The diagnostic trouble code P1135 indicates an issue with the Air/Fuel Ratio Sensor Heater Circuit in Bank 1 Sensor 1. Common causes include Faulty Sensor: The air/fuel ratio sensor itself may be faulty and require replacement, Wiring Issues: Damaged or corroded wiring in the sensor's heater circuit can prevent proper voltage supply, Blown Fuse: A blown fuse in the heater circuit can disrupt the sensor's operation. 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 indicates Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1.
- Common causes
- Common causes include Faulty Sensor: The air/fuel ratio sensor itself may be faulty and require replacement, Wiring Issues: Damaged or corroded wiring in the sensor's heater circuit can prevent proper voltage supply, Blown Fuse: A blown fuse in the heater circuit can disrupt the sensor's operation.
- 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 Description
The diagnostic trouble code P1135 indicates an issue with the Air/Fuel Ratio Sensor Heater Circuit in Bank 1 Sensor 1. This sensor is responsible for measuring 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 in the sensor helps it reach operating temperature quickly for accurate readings.
Common Causes of P1135
- Faulty Sensor: The air/fuel ratio sensor itself may be faulty and require replacement.
- Wiring Issues: Damaged or corroded wiring in the sensor's heater circuit can prevent proper voltage supply.
- Blown Fuse: A blown fuse in the heater circuit can disrupt the sensor's operation.
- ECM Malfunction: A malfunctioning engine control module may not be providing the correct signals to the sensor.
- Exhaust Leak: A leak in the exhaust system near the sensor can affect its operation.
Symptoms of P1135
- Check Engine Light: The most common symptom associated with P1135 is the illumination of the check engine light on the dashboard.
- Decreased Fuel Efficiency: A faulty air/fuel ratio sensor can cause the engine to run rich or lean, leading to decreased fuel efficiency.
- Rough Idling: The engine may experience rough idling or stalling due to incorrect air/fuel mixture adjustments.
- Engine Misfires: Incorrect air/fuel ratio can result in engine misfires, causing vibrations and a loss of power.
- Failed Emissions Test: If the sensor is not functioning correctly, it can lead to increased emissions, potentially causing the vehicle to fail an emissions test.
How to Fix P1135
- Diagnostic Testing: Use a scan tool to retrieve the trouble code and perform diagnostics to confirm the issue with the air/fuel ratio sensor heater circuit.
- Sensor Replacement: Replace the faulty air/fuel ratio sensor in Bank 1 Sensor 1 with a new, OEM-quality part.
- Check Wiring: Inspect the wiring harness for any damage or corrosion and repair or replace as necessary.
- Fuse Inspection: Check and replace any blown fuses in the heater circuit.
- ECM Check: Verify the engine control module's functionality and reprogram or replace if needed.
Cost to Fix P1135
The cost to repair a P1135 code can vary depending on the make and model of the vehicle, the location of the repair shop, and the cost of parts. On average, the repair cost for this issue can range from $200 to $500, including parts and labor. It's recommended to consult with a certified mechanic or auto repair shop to get an accurate estimate based on your specific vehicle and location. Keep in mind that additional diagnostic time and any necessary repairs may increase the overall cost.
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Code P1135 Information for Specific Makes
- P1135 Audi — HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Electrical Malfunction
- P1135 BMW — O2 Sensor Heater Circuit Low Voltage Bank 1 Sensor 1
- P1135 Buick — HO2S Lean Average Bank 1 Sensor 1
- P1135 Cadillac — HO2S Lean Average Bank 1 Sensor 1
- P1135 Chevrolet — HO2S Lean Mean Bank 1 Sensor 1
- P1135 Chrysler — Glow Plug Control Module Voltage Supply Concern
- P1135 Dodge — Glow Plug Control Module Voltage Supply Concern
- P1135 Ford — Pedal Position Sensor 'A' Circuit Intermittent
- P1135 GMC — HO2S Lean Mean Bank 1 Sensor 1
- P1135 Hyundai — Injection Timing Servo
- P1135 Infiniti — Intake Valve Timing Control Bank 2
- P1135 Lexus — Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1
- P1135 MINI — O2 Sensor Heater Circuit Low Voltage Bank 1 Sensor 1
- P1135 Nissan — Intake Valve Timing Control Bank 2
- P1135 Scion — Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1
- P1135 Subaru — Front Left Oxygen Sensor Circuit Open
- P1135 Toyota — Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1
- P1135 Volkswagen — HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Electrical Malfunction
Frequently Asked Questions about P1135 Code
1. What are the common symptoms of OBDII code P1135?
- Common symptoms include poor fuel economy, engine misfires, rough idling, and decreased overall engine performance.
2. What are the possible causes of code P1135?
- The code P1135 can be caused by a faulty air/fuel ratio sensor, damaged wiring or connectors, a blown fuse, or a problem with the engine control module (ECM).
3. How can I diagnose the cause of code P1135?
- To diagnose the cause of code P1135, you can use a scan tool to check for any additional codes, visually inspect the sensor and its connections for damage, and test the sensor's resistance with a multimeter.
4. Can I drive my vehicle with OBDII code P1135?
- It is not recommended to drive your vehicle with code P1135 as it can lead to poor engine performance and potential damage to other components in the long run.
5. How can I repair OBDII code P1135?
- Repairing code P1135 often involves replacing the air/fuel ratio sensor, checking and repairing any damaged wiring or connectors, and resetting the ECM to clear the code.
6. Is it safe to ignore OBDII code P1135?
- Ignoring code P1135 can lead to reduced fuel efficiency, engine performance issues, and potential damage to the catalytic converter. It is best to address the issue promptly.
7. Can a DIY enthusiast fix OBDII code P1135?
- While some DIY enthusiasts may be able to diagnose and replace the air/fuel ratio sensor, it is recommended to have a professional mechanic perform the repair to ensure proper installation and prevent further issues.
8. How much does it cost to repair OBDII code P1135?
- The cost of repairing code P1135 can vary depending on the make and model of your vehicle, the cost of the replacement parts, and the labor rates of the repair shop. It is best to get a few quotes from different shops.
9. Will resetting the ECM clear OBDII code P1135?
- Resetting the ECM may temporarily clear the code, but if the underlying issue causing code P1135 is not addressed, the code is likely to return. It is important to diagnose and repair the root cause of the problem.
10. How often does OBDII code P1135 occur in vehicles?
- OBDII code P1135, indicating an air/fuel ratio sensor heater circuit malfunction, is a relatively common issue in vehicles equipped with this sensor.
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