B2720
Rear Sonar Sensor Left Outer
B2720 is an OBD-II diagnostic trouble code meaning: Rear Sonar Sensor Left Outer. Common causes: mechanical damage to the sensor (crack, water ingress), open or shorted wiring harness. Estimated repair cost: $33–111.
Symptoms
- Rear parking sensors not working
- False alarms of the parking system
- PDC error message on dashboard
Causes
- Mechanical damage to the sensor (crack, water ingress)
- Open or shorted wiring harness
- Oxidation of sensor connector contacts
- PDC control module malfunction
How to Fix
- Visually inspect the sensor for damage
- Checking the integrity of the wiring harness and contacts
- Diagnosis of sensor resistance (usually 300-800 Ohms)
- Replacing a faulty sensor if necessary
- Resetting the error and checking the system operation
Related codes
FAQ
What does the B2720 code mean?
B2720 is an OBD-II diagnostic trouble code that indicates: Rear Sonar Sensor Left Outer
What causes a B2720 error code?
The most common causes of B2720 include: Mechanical damage to the sensor (crack, water ingress); Open or shorted wiring harness; Oxidation of sensor connector contacts; PDC control module malfunction.
How do I fix a B2720 diagnostic trouble code?
To fix B2720: Visually inspect the sensor for damage. Checking the integrity of the wiring harness and contacts. Diagnosis of sensor resistance (usually 300-800 Ohms). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2720?
Limited driving only, diagnose soon
How much does it cost to fix B2720?
The estimated repair cost for B2720 is $33–111. Actual cost depends on your vehicle, location, and labor rates.
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