P0071 BMW Code - Ambient Sensor Rationality Check
Quick Answer
The Powertrain Control Module (PCM) monitors the Ambient Air Temperature Sensor. Common causes include Faulty ambient air temperature sensor, Ambient air temperature sensor harness is open or shorted, Ambient air temperature sensor 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
- P0071 BMW indicates Ambient Sensor Rationality Check.
- Common causes
- Common causes include Faulty ambient air temperature sensor, Ambient air temperature sensor harness is open or shorted, Ambient air temperature sensor 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 P0071 BMW Description
What are the Possible Causes of the DTC P0071 BMW?
- Faulty ambient air temperature sensor
- Ambient air temperature sensor harness is open or shorted
- Ambient air temperature sensor circuit poor electrical connection
How to Fix the DTC P0071 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 P0071 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 P0071 BMW code?
Need more information on how to fix the P0071 BMW code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0071 BMW code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0071 BMW Code
1. What are the common symptoms of OBDII code P0071 in a BMW related to the Ambient Sensor Rationality Check?
The common symptoms include inaccurate ambient temperature readings on the dashboard, incorrect climate control operation, and potential issues with automatic lighting systems.
2. What are the possible causes of OBDII code P0071 in a BMW?
The code P0071 in a BMW is typically triggered by a faulty ambient temperature sensor, wiring issues in the ambient sensor circuit, or a problem with the sensor's connection to the vehicle's computer.
3. How can I diagnose the root cause of OBDII code P0071 in my BMW?
To diagnose the issue, you can start by checking the wiring and connections of the ambient temperature sensor, testing the sensor's resistance, and using a multimeter to verify proper voltage signals in the sensor circuit.
4. Can I still drive my BMW with OBDII code P0071 present?
While it is possible to drive with the code present, it is recommended to address the issue promptly to prevent potential inaccuracies in temperature readings and ensure proper operation of climate control and lighting systems.
5. How can I repair OBDII code P0071 in my BMW?
Repairing the code typically involves replacing the faulty ambient temperature sensor, repairing any damaged wiring or connections in the sensor circuit, and clearing the code with an OBDII scanner.
6. Does resetting the OBDII code P0071 in my BMW solve the issue?
Resetting the code may temporarily clear the warning light, but if the underlying issue with the ambient temperature sensor or circuit is not addressed, the code is likely to reappear.
7. Are there any DIY tips for fixing OBDII code P0071 in a BMW?
While some basic diagnostics and sensor replacement can be done by DIY enthusiasts, it is recommended to seek professional help for accurate diagnosis and repair of the code to ensure proper functioning of the ambient sensor system.
8. Will OBDII code P0071 affect my BMW's fuel efficiency or performance?
The code itself may not directly impact fuel efficiency or performance, but ignoring the underlying issue with the ambient sensor system could lead to inaccuracies in temperature-sensitive operations, potentially affecting overall vehicle performance.
9. How long does it typically take to repair OBDII code P0071 in a BMW?
The repair time can vary depending on the exact cause of the code and the availability of parts. In general, a straightforward repair involving sensor replacement and circuit checks can be completed within a few hours.
10. Can extreme weather conditions trigger OBDII code P0071 in a BMW?
Extreme temperature fluctuations or exposure to harsh weather conditions can sometimes affect the ambient temperature sensor's performance, potentially leading to the triggering of code P0071 in a BMW.
Discuss the causes and fixes for P0071 BMW OBDII Code
-
Check engine light came on. Car had to be put on a charger to start a few days before. 208 BMW 528i
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
