P1139 BMW Code - O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 2
Quick Answer
P1139 BMW indicates O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 2. Common causes include Faulty HO2S Bank 1 Sensor 2, HO2S Bank 1 Sensor 2 harness is open or shorted, HO2S Bank 1 Sensor 2 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
- P1139 BMW indicates O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty HO2S Bank 1 Sensor 2, HO2S Bank 1 Sensor 2 harness is open or shorted, HO2S Bank 1 Sensor 2 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 P1139 BMW Description
What are the Possible Causes of the DTC P1139 BMW?
- Faulty HO2S Bank 1 Sensor 2
- HO2S Bank 1 Sensor 2 harness is open or shorted
- HO2S Bank 1 Sensor 2 circuit poor electrical connection
How to Fix the DTC P1139 BMW?
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 P1139 BMW 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 P1139 BMW Code
What does the OBDII code P1139 mean on a BMW?
The P1139 code on a BMW indicates a problem with the O2 sensor heater circuit, specifically high voltage in Bank 1 Sensor 2.
What are the common symptoms of code P1139 on a BMW?
Symptoms include a check engine light, reduced fuel efficiency, rough idling, and possible difficulty passing emissions tests.
What causes the P1139 code to appear on a BMW?
Common causes include a faulty O2 sensor, damaged wiring or connectors in the sensor circuit, or an issue with the vehicle's power supply to the heater circuit.
Which O2 sensor does P1139 refer to on a BMW?
P1139 refers to the downstream (post-catalytic converter) O2 sensor on Bank 1.
Can I drive my BMW with the P1139 code active?
While the car may still be drivable, continuing to drive with this code can lead to reduced performance and potential damage to the catalytic converter.
How can I diagnose the P1139 code on a BMW?
Diagnosis involves inspecting the O2 sensor and its wiring, checking for continuity in the heater circuit, and verifying proper voltage and ground connections.
What tools are needed to fix the P1139 code on a BMW?
You’ll need an OBDII scanner, a multimeter, and basic hand tools to inspect and replace the O2 sensor if necessary.
How much does it cost to fix the P1139 code on a BMW?
Repair costs vary but typically range from $150 to $300, depending on whether the O2 sensor or wiring needs replacement.
Can a bad fuse cause the P1139 code on a BMW?
Yes, a blown fuse related to the O2 sensor heater circuit can cause this code to appear.
How can I prevent the P1139 code from recurring on my BMW?
Regularly inspect and maintain the O2 sensor and its wiring, and address any exhaust system issues promptly.
Discuss the causes and fixes for P1139 BMW OBDII Code
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