U01B7
Lost Communication With Switch Input Module A
U01B7 is an OBD-II diagnostic trouble code meaning: Lost Communication With Switch Input Module A. Common causes: switch module a fault, open or short circuit in the communication circuit. Estimated repair cost: $56–167.
Symptoms
- Some switches in the cabin do not work
- Check Engine Light Is On
- Malfunctions of the car's electronic systems
- Other related trouble codes appear
Causes
- Switch module A fault
- Open or short circuit in the communication circuit
- Poor contact in module connectors
- Module power problems
- CAN network fault
How to Fix
- Check the integrity of the wiring harness to the module
- Inspect the module connectors for oxidation or damage.
- Check the power supply and ground of the module
- Scan the CAN network for errors
- Replace switch module if necessary
Related codes
Error U01B7 by Vehicle Brand
FAQ
What does the U01B7 code mean?
U01B7 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Switch Input Module A
What causes a U01B7 error code?
The most common causes of U01B7 include: Switch module A fault; Open or short circuit in the communication circuit; Poor contact in module connectors; Module power problems.
How do I fix a U01B7 diagnostic trouble code?
To fix U01B7: Check the integrity of the wiring harness to the module. Inspect the module connectors for oxidation or damage.. Check the power supply and ground of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U01B7?
Yes, but get it checked soon
How much does it cost to fix U01B7?
The estimated repair cost for U01B7 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat