AutoCodes – BMW – P1160 BMW

P1160 BMW Code - Fuel Trim Adaptation Additive Low Bank 2

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 2. 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: P1160 BMW indicates Fuel Trim Adaptation Additive Low Bank 2.
Common causes: Common causes include Air leaks, Faulty Mass Air Flow (MAF) Sensor, Faulty Oxygen Sensor Bank 2.
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 Popularity 7,141

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1160 BMW Description

Short term fuel trim (STFT) is a value that indicates how the Engine Control Module (ECM) is adapting the factory programmed fuel map. The fuel map is a lookup table that is referred to by the controller. This is used to govern the correct amount of fuel to inject. This amount depends on the speed and load conditions monitored on the vehicle. The (STFT) Value alters depending on which fuel map load cell the engine is operating during speed and load conditions.
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.

OBDII Code P1160 BMW - Fuel Trim Adaptation Additive Low Bank 2 - AutoCodes.com — P1160 BMW Code - Fuel Trim Adaptation Additive Low Bank 2

What does this mean?

What are the Possible Causes of the DTC P1160 BMW?

Air leaks
Faulty Mass Air Flow (MAF) Sensor
Faulty Oxygen Sensor Bank 2
Low Fuel Pressure
Faulty Spark Plugs
Faulty Fuel Injectors

How to Fix the DTC P1160 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 P1160 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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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1160 BMW Code

What does the OBDII code P1160 mean on a BMW?

P1160 indicates "Fuel Trim Adaptation Additive Low Bank 2," which means the engine control module has detected an issue with the fuel mixture adjustment for Bank 2.

What are the common symptoms of BMW code P1160?

Symptoms may include poor fuel economy, rough idle, hesitation during acceleration, and the Check Engine Light being illuminated.

What causes the P1160 code on a BMW?

Possible causes include a vacuum leak, faulty oxygen sensor, dirty or failing mass airflow sensor, or issues with fuel injectors or the fuel system.

Can a dirty air filter trigger the P1160 code?

Yes, a clogged or dirty air filter can affect airflow and fuel mixture, potentially leading to the P1160 code.

How can I diagnose the P1160 code on a BMW?

Start by checking for vacuum leaks, inspecting the oxygen sensors, cleaning the mass airflow sensor, and verifying the fuel pressure and injector performance.

Is it safe to drive with the P1160 code on a BMW?

While the car may still drive, prolonged driving with this code can lead to further engine issues and decreased efficiency. Itâ€™s best to address it promptly.

How can a vacuum leak cause the P1160 code?

A vacuum leak can disrupt the air-fuel ratio, causing the engine control module to struggle with fuel trim adjustments, which triggers the code.

Do oxygen sensors often cause the P1160 code?

A faulty or aging oxygen sensor can fail to provide accurate readings, leading to improper fuel trim adjustments and triggering this code.

Will replacing the mass airflow sensor fix the P1160 code?

If the mass airflow sensor is dirty or malfunctioning, cleaning or replacing it may resolve the issue. However, other components should be inspected as well.

What repair steps can fix the P1160 code on a BMW?

Possible fixes include repairing vacuum leaks, replacing faulty oxygen sensors, cleaning or replacing the mass airflow sensor, and ensuring proper fuel injector operation.