P1159 BMW Code - Fuel Trim Adaptation Additive High Bank 1
Quick Answer
Short term fuel trim (STFT) is a value that indicates how the Engine Control Module (ECM) is adapting the factory programmed fuel map. Common causes include Air leaks, Faulty Mass Air Flow (MAF) Sensor, Faulty Oxygen Sensor Bank 1. 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
- P1159 BMW indicates Fuel Trim Adaptation Additive High Bank 1.
- Common causes
- Common causes include Air leaks, Faulty Mass Air Flow (MAF) Sensor, Faulty Oxygen Sensor Bank 1.
- 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 P1159 BMW Description
The oxygen sensor is a key part of the fuel trim calculation. If the Oxygen sensor indicates a lean mixture, the (STFT) will be increased above the typical Value. If the Oxygen Sensor indicates a rich mixture the (STFT) will be reduced below the typical Value. In normal operation, the fuel trim values will cycle between a maximum of 10 and -10%. (STFT) which exceed this Value should be investigated.
What are the Possible Causes of the DTC P1159 BMW?
- Air leaks
- Faulty Mass Air Flow (MAF) Sensor
- Faulty Oxygen Sensor Bank 1
- Low Fuel Pressure
- Faulty Spark Plugs
- Faulty Fuel Injectors
How to Fix the DTC P1159 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 P1159 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.
Need more information about the P1159 BMW code?
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Need Help with the Code?
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Frequently Asked Questions about P1159 BMW Code
1. What are the common symptoms of OBDII code P1159 in a BMW related to Fuel Trim Adaptation Additive High Bank 1?
Symptoms may include rough idling, decreased fuel efficiency, engine misfires, and a noticeable decrease in overall engine performance.
2. What are the possible causes of OBDII code P1159 in a BMW?
Potential causes of this code include a faulty oxygen sensor, vacuum leaks, a dirty or clogged fuel injector, a malfunctioning mass airflow sensor (MAF), or issues with the fuel pressure regulator.
3. How can I diagnose the OBDII code P1159 in my BMW?
Diagnosis typically involves using an OBDII scanner to retrieve the code, checking for related codes or pending codes, conducting a visual inspection for obvious issues like leaks, and performing various tests on components like the oxygen sensor and fuel injectors.
4. Can I drive my BMW with the OBDII code P1159 related to Fuel Trim Adaptation Additive High Bank 1?
It is not recommended to drive your BMW with this code active, as it can lead to further engine damage and potentially unsafe driving conditions. It is advisable to address the issue promptly.
5. How can I repair OBDII code P1159 in my BMW?
Repair options may include replacing the faulty oxygen sensor, repairing any vacuum leaks, cleaning or replacing the fuel injector, inspecting and cleaning the MAF sensor, or addressing issues with the fuel pressure regulator.
6. Are there any DIY tips for addressing OBDII code P1159 in my BMW?
While some tasks like inspecting for obvious leaks or checking the condition of the oxygen sensor can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for a thorough diagnosis and repair of this code.
7. Will resetting the OBDII code P1159 fix the issue in my BMW?
Resetting the code may temporarily clear the warning light, but it will not address the underlying issue causing the code to trigger. It is essential to diagnose and repair the root cause of the problem.
8. How much does it typically cost to repair OBDII code P1159 in a BMW?
The cost of repairs can vary depending on the specific issue causing the code, the labor rates in your area, and the cost of replacement parts. It is advisable to obtain quotes from local mechanics or BMW specialists.
9. Can a BMW dealership help with diagnosing and repairing OBDII code P1159?
Yes, BMW dealerships have trained technicians and specialized diagnostic equipment to accurately diagnose and repair OBDII codes like P1159. However, independent BMW specialists may also offer competitive services for this issue.
10. How often does OBDII code P1159 related to Fuel Trim Adaptation Additive High Bank 1 occur in BMW vehicles?
While the frequency may vary, this code can occur in BMW vehicles experiencing issues with fuel trim adaptation, so it is not uncommon among certain models and age ranges of BMW cars.
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