P1751 Honda Code - Mechanical Problem In Hydraulic Control System Of Shift Solenoid Valve 'B'
Quick Answer
The Transmission Control Module (TCM) monitors the Shift Solenoid Valve 'B'. Common causes include Low Automatic Transmission Fluid Level, Faulty Shift Solenoid Valve 'B', Shift Solenoid Valve 'B' harness is open or shorted. 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
- P1751 Honda indicates Mechanical Problem In Hydraulic Control System Of Shift Solenoid Valve 'B'.
- Common causes
- Common causes include Low Automatic Transmission Fluid Level, Faulty Shift Solenoid Valve 'B', Shift Solenoid Valve 'B' harness is open or shorted.
- 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 P1751 Honda Description
What are the Possible Causes of the DTC P1751 Honda?
- Low Automatic Transmission Fluid Level
- Faulty Shift Solenoid Valve 'B'
- Shift Solenoid Valve 'B' harness is open or shorted
- Shift Solenoid Valve 'B' circuit poor electrical connection
How to Fix the DTC P1751 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1751 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 P1751 Honda Code
1. What are the common symptoms of OBDII code P1751 in a Honda related to the mechanical problem in the hydraulic control system of shift solenoid valve 'B'?
The common symptoms include harsh shifting, delayed or no gear engagement, erratic shifting patterns, and the transmission being stuck in a single gear.
2. What are the potential causes of OBDII code P1751 in a Honda?
The code P1751 typically indicates a mechanical problem in the hydraulic control system of shift solenoid valve 'B', which can be caused by issues such as a faulty shift solenoid, low transmission fluid level, dirty transmission fluid, or a damaged wiring harness.
3. How can I diagnose the issue causing OBDII code P1751 in my Honda?
Diagnosing the issue involves performing a thorough inspection of the shift solenoid valve 'B', checking the transmission fluid level and condition, conducting a visual inspection of the wiring harness, and using a scan tool to retrieve additional transmission fault codes.
4. Can driving with OBDII code P1751 in a Honda cause further damage?
Continuing to drive with code P1751 present in your Honda can potentially lead to further damage to the transmission components, resulting in more costly repairs down the line. It is recommended to address the issue promptly.
5. What is the typical repair process for OBDII code P1751 in a Honda?
The repair process usually involves replacing the faulty shift solenoid valve 'B', performing a transmission fluid flush and filter replacement, checking and repairing any damaged wiring, and clearing the fault codes from the vehicle's memory.
6. How much does it typically cost to repair OBDII code P1751 in a Honda?
The cost of repairing OBDII code P1751 can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the repair cost can range from $200 to $600, including parts and labor.
7. Can I reset OBDII code P1751 in my Honda without fixing the underlying issue?
While you can clear the fault code using an OBDII scanner, it is not recommended to do so without addressing the root cause of the problem. Resetting the code without fixing the issue will only temporarily mask the problem and may lead to further complications.
8. Are there any preventive maintenance tips to avoid OBDII code P1751 in a Honda?
To prevent OBDII code P1751, it is crucial to regularly check and maintain the transmission fluid level and condition, follow the manufacturer's recommended service intervals, and address any transmission-related symptoms promptly to avoid potential damage.
9. How long does it take to repair OBDII code P1751 in a Honda?
The repair time for OBDII code P1751 can vary depending on the specific issue and the expertise of the technician. In general, the repair process can take anywhere from 2 to 4 hours to complete.
10. Can I fix OBDII code P1751 in a Honda myself, or do I need a professional mechanic?
While some DIY enthusiasts may be able to address simpler transmission issues, diagnosing and repairing OBDII code P1751 often requires specialized tools and expertise. It is recommended to consult a professional mechanic for accurate diagnosis and repair of this code.
Discuss the causes and fixes for P1751 Honda OBDII Code
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Start by checking the transmission fluid level and condition. If the fluid is OK, then you may have to replace the Shift Solenoid Valve 'B'.

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I checked my transmission fluid it's okay so what do you think I should do next please help
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Start by checking the transmission fluid level and condition. If the fluid is OK, then you must replace the shift solenoid to repair the problem.
P1751 Shift Solenoid B
P1753 Torque Converter Clutch SolenoidHere is a video that explains how to replace both solenoids
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