Bobcat Machine P16C1 DCU Monitoring Error Solution

This guide provides step-by-step instructions for diagnosing and repairing the P16C1 DCU Monitoring Error on Bobcat machines.

Related Contents:

Bobcat diagnostic tool

Fault Code: P16C1

Error Description:
DCU Monitoring Error (Query/Response Communication Delay)

Related Code: U520698-12

1. Possible Causes

The error may be triggered by the following electrical issues:

1. Power Supply Problems
   • Abnormal engine shutdown
   • Battery removed while engine is running or ignition is ON
   • Battery voltage drops below 6V
2. Wiring Issues
   • Faulty or damaged wiring harness connected to the DCU power and ground
   • Loose or corroded DCU connector
3. Internal DCU Fault
   • Malfunctioning or damaged DCU

2. Component Location

(Refer to the machine’s service manual or schematic to identify the exact location of the DCU and related wiring components.)

3. Diagnostic Activation Condition

• Ignition switch in the ON position or
• Engine running

4. Fault Trigger Condition

• The fault is set when query/response communication between control modules is delayed multiple times.

5. Fault Clearing Condition

• The error clears automatically when normal communication between modules resumes without delay.

6. Diagnostic Checklist

Use the following steps to identify and correct the issue: