U1300
Low Voltage On Class 2 Serial Data Circuit
U1300 is an OBD-II diagnostic trouble code meaning: Low Voltage On Class 2 Serial Data Circuit. Common causes: short circuit to ground in class 2 circuit, broken or damaged data transmission circuit wires. Estimated repair cost: $6–56.
Symptoms
- Incorrect operation of various vehicle systems
- Multiple errors appearing in other modules
- Problems starting the engine
- Dashboard malfunctions
Causes
- Short circuit to ground in Class 2 circuit
- Broken or damaged data transmission circuit wires
- Malfunction of one of the modules connected to the circuit
- Problems with power supply to the main communication module
- Corrosion or poor contact in circuit connectors
How to Fix
- Check continuity of Class 2 circuit wiring
- Diagnose circuit resistance and insulation
- Check connectors and connectors for corrosion
- Disable the modules one by one to identify the faulty one.
- Check the power supply to the main communication module
Related codes
FAQ
What does the U1300 code mean?
U1300 is an OBD-II diagnostic trouble code that indicates: Low Voltage On Class 2 Serial Data Circuit
What causes a U1300 error code?
The most common causes of U1300 include: Short circuit to ground in Class 2 circuit; Broken or damaged data transmission circuit wires; Malfunction of one of the modules connected to the circuit; Problems with power supply to the main communication module.
How do I fix a U1300 diagnostic trouble code?
To fix U1300: Check continuity of Class 2 circuit wiring. Diagnose circuit resistance and insulation. Check connectors and connectors for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1300?
Yes, but get it checked soon
How much does it cost to fix U1300?
The estimated repair cost for U1300 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat