Rear Differential Pump Motor
Table of contents
C1851 HONDA Possible Causes
- Faulty Rear Differential Pump Motor
- Rear Differential Pump Motor harness is open or shorted
- Rear Differential Pump Motor circuit poor electrical connection
- Faulty AWD Control Unit
How do I fix code C1851 HONDA?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- DTC C1851-1E: Rear Differential Pump Motor Circuit High Current
- DTC C1851-18: Rear Differential Pump Motor Circuit Low Current
- DTC C1851-19: Control Module Internal Control Module Malfunction
Cost of diagnosing the C1851 HONDA code
The cost of diagnosing the C1851 HONDA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C1851 HONDA Description
The AWD Control Unit monitors the Rear Differential Pump Motor. The AWD Control Unit sets the OBDII code when the Rear Differential Pump Motor is not to factory specifications.