P0720 BMW Code - Output Speed Sensor Circuit
Quick Answer
The speed sensor detects the revolution of the idler gear parking pawl lock gear and emits a pulse signal. Common causes include Faulty Speed Sensor, Speed Sensor harness is open or shorted, Speed 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
- P0720 BMW indicates Output Speed Sensor Circuit.
- Common causes
- Common causes include Faulty Speed Sensor, Speed Sensor harness is open or shorted, Speed 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 P0720 BMW Description
What are the Possible Causes of the DTC P0720 BMW?
- Faulty Speed Sensor
- Speed Sensor harness is open or shorted
- Speed Sensor circuit poor electrical connection
How to Fix the DTC P0720 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 P0720 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 P0720 BMW Code
1. What does the OBDII code P0720 mean on a BMW?
P0720 indicates a problem with the output speed sensor circuit, which monitors the rotational speed of the transmission's output shaft.
2. What are the symptoms of a P0720 code on a BMW?
Symptoms may include erratic or delayed shifting, harsh gear changes, the transmission stuck in one gear, or an illuminated check engine light.
3. What causes the P0720 code to appear on a BMW?
Common causes include a faulty output speed sensor, damaged wiring or connectors, a malfunctioning transmission control module (TCM), or low transmission fluid.
4. Can I drive my BMW with a P0720 code?
While it may be possible to drive, it is not recommended, as transmission performance issues could worsen and lead to further damage.
5. How do I fix a P0720 code on my BMW?
Start by inspecting the output speed sensor and its wiring for damage. Replace the sensor if faulty, repair any damaged wiring, and ensure the transmission fluid is at the correct level.
6. How much does it cost to repair the P0720 code on a BMW?
The cost can vary depending on the issue, ranging from $100 to $300 for a speed sensor replacement to higher amounts if wiring or the TCM needs repair.
7. How can I test the output speed sensor on my BMW?
You can test the sensor using a multimeter to check for proper resistance or signal output. Refer to your BMW's service manual for specific values.
8. Could low transmission fluid cause the P0720 code on a BMW?
Yes, low or dirty transmission fluid can affect the sensor's performance and trigger the P0720 code.
9. Will clearing the P0720 code fix the issue on my BMW?
Clearing the code will remove it temporarily, but the underlying issue must be addressed to prevent the code from returning.
10. Can a bad output speed sensor damage the transmission on a BMW?
If left unaddressed, a faulty sensor can lead to improper shifting and potential transmission damage over time.
Discuss the causes and fixes for P0720 BMW OBDII Code
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This is awesome. It gave me clear insight of what is going on in the car. I just thought the transmission was gone but maybe not.
Thank you AutoCodes -
I just replaced the secondary air pump. then I replaced the two front wheel speed sensors. Now today the trans failsafe prog came on. I pulled the code and it is P0720 output speed sensor. also previously the transmission slips after eighty mph. now the car does not accelerate. Do I need a new speed sensor?? The car is a 2002 BMW X5 4.41 with 118,000 miles .
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