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Engine-Codes – BMW – P1112 BMW

P1112 BMW Code - Engine Coolant Temperature Radiator Outlet Sensor High Input

Quick Answer

The P1112 BMW code indicates a problem with the Engine Coolant Temperature Radiator Outlet Sensor, specifically a high input signal being detected by the engine control module (ECM). Common causes include Faulty Engine Coolant Temperature Radiator Outlet Sensor, Wiring or connector issues in the sensor circuit, Coolant system leaks or low coolant level. 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
P1112 BMW indicates Engine Coolant Temperature Radiator Outlet Sensor High Input.
Common causes
Common causes include Faulty Engine Coolant Temperature Radiator Outlet Sensor, Wiring or connector issues in the sensor circuit, Coolant system leaks or low coolant level.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P1112 BMW Description

The P1112 BMW code indicates a problem with the Engine Coolant Temperature Radiator Outlet Sensor, specifically a high input signal being detected by the engine control module (ECM). This sensor is responsible for monitoring the temperature of the coolant as it exits the radiator, providing critical data for the ECM to adjust fuel delivery and ignition timing to optimize engine performance and efficiency.

OBDII Code P1112 BMW - Engine Coolant Temperature Radiator Outlet Sensor High Input
P1112 BMW Code - Engine Coolant Temperature Radiator Outlet Sensor High Input

Common Causes of P1112 BMW

  1. Faulty Engine Coolant Temperature Radiator Outlet Sensor
  2. Wiring or connector issues in the sensor circuit
  3. Coolant system leaks or low coolant level
  4. ECM software or hardware issues
  5. Engine overheating due to a malfunctioning cooling system component

Symptoms of P1112 BMW

  1. Check Engine Light (CEL) illuminated on the dashboard
  2. Engine running hotter than usual
  3. Decreased fuel efficiency
  4. Engine misfires or rough idling
  5. Loss of power or acceleration

How to Fix P1112 BMW

  1. Begin by diagnosing the issue using a scan tool to confirm the P1112 code and pinpoint the exact cause of the high input signal.
  2. Inspect the Engine Coolant Temperature Radiator Outlet Sensor and its wiring for any visible damage or corrosion. Replace the sensor if necessary.
  3. Check the coolant level and inspect for leaks in the cooling system. Repair any leaks and top up the coolant to the proper level.
  4. Clear the fault code from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to identify any underlying issues with the ECM or other components of the cooling system.

Cost to Fix P1112 BMW

The cost of repairing a P1112 BMW code can vary depending on the specific cause of the issue and the labor rates in your area. In general, you can expect to pay anywhere from $100 to $300 for parts and labor to address this problem. Keep in mind that diagnostic time and labor rates can fluctuate based on location, vehicle make and model, and the complexity of the repair. Be sure to consult with a trusted mechanic or dealership for a more accurate estimate based on your individual circumstances.

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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 P1112 BMW Code

1. What are the common symptoms of OBDII code P1112 in a BMW related to the Engine Coolant Temperature Radiator Outlet Sensor High Input?

The common symptoms include engine overheating, poor fuel economy, rough idling, and potential stalling.

2. What typically causes the OBDII code P1112 in a BMW?

This code is usually triggered by a faulty Engine Coolant Temperature Radiator Outlet Sensor, wiring issues, or a problem within the cooling system.

3. How can I diagnose the issue causing OBDII code P1112 in my BMW?

You can use a diagnostic scanner to read and interpret the code, visually inspect the sensor and its wiring for any damage, and perform a cooling system pressure test.

4. Can a DIY enthusiast repair OBDII code P1112 in a BMW?

Yes, if you have the necessary tools and knowledge, you can replace the Engine Coolant Temperature Radiator Outlet Sensor yourself. Just make sure to follow the manufacturer's instructions.

5. Are there any temporary solutions to consider when experiencing OBDII code P1112 in a BMW?

You can try resetting the code with a scanner to see if it reoccurs, but it's crucial to address the underlying issue promptly to prevent further damage.

6. How urgent is it to address OBDII code P1112 in a BMW?

It is recommended to address this code promptly to prevent potential engine damage from overheating and to ensure optimal performance and fuel efficiency.

7. Can a faulty Engine Coolant Temperature Radiator Outlet Sensor cause other issues in a BMW?

Yes, a faulty sensor can lead to incorrect temperature readings, affecting the engine's performance, emissions, and overall driving experience.

8. How long does it typically take to repair OBDII code P1112 in a BMW?

The repair time can vary depending on your experience level and access to tools, but replacing the sensor usually takes around 1-2 hours.

9. Is it safe to continue driving with OBDII code P1112 in a BMW?

It is not recommended to drive with this code present, as it can lead to engine overheating and potential damage. It's best to address the issue as soon as possible.

10. Can OBDII code P1112 in a BMW be prevented?

Regular maintenance of the cooling system, including checking the sensor and its connections, can help prevent this code from appearing.

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