C1851 Honda Code - Rear Differential Pump Motor
Quick Answer
The AWD Control Unit monitors the Rear Differential Pump Motor. Common causes include Faulty Rear Differential Pump Motor, Rear Differential Pump Motor harness is open or shorted, Rear Differential Pump Motor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C1851 Honda indicates Rear Differential Pump Motor.
- Common causes
- Common causes include Faulty Rear Differential Pump Motor, Rear Differential Pump Motor harness is open or shorted, Rear Differential Pump Motor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code C1851 Honda Description
What are the Possible Causes of the DTC C1851 Honda?
- 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 to Fix the DTC C1851 Honda?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
DTC C1851-18: Rear Differential Pump Motor Circuit Low Current
DTC C1851-19: Control Module Internal Control Module Malfunction
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1851 Honda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about C1851 Honda Code
1. What are the common symptoms of OBDII code C1851 in a Honda related to the rear differential pump motor?
The common symptoms include the malfunction indicator light (MIL) illuminating on the dashboard, difficulty shifting gears, and unusual noises coming from the rear differential area.
2. What are the possible causes of OBDII code C1851 in a Honda indicating a rear differential pump motor issue?
The code C1851 in a Honda can be triggered by a faulty rear differential pump motor, damaged wiring or connectors, low fluid levels in the differential, or a malfunctioning control module.
3. How can I diagnose the OBDII code C1851 in my Honda that points to a problem with the rear differential pump motor?
To diagnose the issue, you can use an OBDII scanner to read the trouble codes, inspect the wiring and connectors for any visible damage, check the fluid levels in the rear differential, and perform a thorough visual inspection of the pump motor.
4. What are some repair tips for fixing OBDII code C1851 in a Honda related to the rear differential pump motor?
Repair tips include replacing the rear differential pump motor if it is faulty, repairing or replacing any damaged wiring or connectors, ensuring proper fluid levels in the differential, and resetting the trouble codes after the repairs are completed.
5. Can I continue driving my Honda with OBDII code C1851 indicating a rear differential pump motor issue?
It is not recommended to continue driving the vehicle with this issue as it can lead to further damage to the rear differential system. It is best to address the problem promptly to avoid potential safety hazards and costly repairs in the future.
6. How much does it typically cost to repair OBDII code C1851 in a Honda related to the rear differential pump motor?
The cost of repairing OBDII code C1851 can vary depending on the extent of the damage and the specific repairs needed. It is advisable to consult with a professional mechanic to get an accurate estimate for the repair.
7. Is it possible to reset the OBDII code C1851 in a Honda without fixing the rear differential pump motor issue?
While you can clear the trouble code temporarily, it is not recommended as the underlying issue with the rear differential pump motor may worsen over time and lead to more significant problems if left unresolved.
8. How often should the rear differential pump motor be inspected in a Honda to prevent OBDII code C1851 from occurring?
It is advisable to include the rear differential pump motor in your regular maintenance schedule and have it inspected during routine service intervals or whenever you notice any symptoms indicating a potential issue.
9. Can a DIY enthusiast with basic automotive knowledge repair OBDII code C1851 in a Honda related to the rear differential pump motor?
While some basic repairs like checking wiring connections or fluid levels can be done by a DIY enthusiast, diagnosing and repairing more complex issues with the rear differential pump motor may require professional expertise to ensure proper resolution.
10. Are there any recalls or service bulletins related to OBDII code C1851 in Honda vehicles regarding the rear differential pump motor?
It is recommended to check with the nearest Honda dealership or visit the official Honda website to inquire about any recalls or service bulletins related to OBDII code C1851 and the rear differential pump motor in your specific vehicle model.
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