P1601
Serial Communication Malfunction
P1601 is an OBD-II diagnostic trouble code meaning: Serial Communication Malfunction. Common causes: broken or damaged serial bus wires, short circuit in communication circuit. Estimated repair cost: $6–56.
Symptoms
- Check Engine Light Is On
- Incorrect operation of some vehicle systems
- Problems starting the engine
- Dashboard malfunctions
- Lost connection with diagnostic equipment
Causes
- Broken or damaged serial bus wires
- Short circuit in communication circuit
- Oxidized or damaged connectors
- Malfunction of one of the ECU modules
- Problems with power supply to communication modules
How to Fix
- Check the condition of the serial bus wiring harness
- Inspect and clean all connectors in the communication circuit
- Check power and ground of communication modules
- Diagnose each system module for faults
- If necessary, replace damaged wires or connectors
Related codes
Error P1601 by Vehicle Brand
FAQ
What does the P1601 code mean?
P1601 is an OBD-II diagnostic trouble code that indicates: Serial Communication Malfunction
What causes a P1601 error code?
The most common causes of P1601 include: Broken or damaged serial bus wires; Short circuit in communication circuit; Oxidized or damaged connectors; Malfunction of one of the ECU modules.
How do I fix a P1601 diagnostic trouble code?
To fix P1601: Check the condition of the serial bus wiring harness. Inspect and clean all connectors in the communication circuit. Check power and ground of communication modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1601?
Yes, but get it checked soon
How much does it cost to fix P1601?
The estimated repair cost for P1601 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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