P1904 Code - Engine Coolant Hydraulic Blower Motor Solenoid Open Circuit/Short To Ground
Quick Answer
P1904 indicates Engine Coolant Hydraulic Blower Motor Solenoid Open Circuit/Short To Ground. Common causes include Faulty Engine Coolant Hydraulic Blower Motor Solenoid, Engine Coolant Hydraulic Blower Motor Solenoid harness is open or shorted, Engine Coolant Hydraulic Blower Motor Solenoid 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
- P1904 indicates Engine Coolant Hydraulic Blower Motor Solenoid Open Circuit/Short To Ground.
- Common causes
- Common causes include Faulty Engine Coolant Hydraulic Blower Motor Solenoid, Engine Coolant Hydraulic Blower Motor Solenoid harness is open or shorted, Engine Coolant Hydraulic Blower Motor Solenoid 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 P1904 Description
What are the Possible Causes of the DTC P1904?
- Faulty Engine Coolant Hydraulic Blower Motor Solenoid
- Engine Coolant Hydraulic Blower Motor Solenoid harness is open or shorted
- Engine Coolant Hydraulic Blower Motor Solenoid circuit poor electrical connection
How to Fix the DTC P1904?
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 P1904 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.
Need more information about the P1904 code?
Need more information on how to fix the P1904 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1904 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1904 Audi — Engine Coolant Hydraulic Blower Motor Solenoid Open Circuit/Short To Ground
- P1904 Ford — Kickdown Solenoid Circuit High Voltage
- P1904 Volkswagen — Engine Coolant Hydraulic Blower Motor Solenoid Open Circuit/Short To Ground
Frequently Asked Questions about P1904 Code
1. What are common symptoms of OBDII code P1904 related to the Engine Coolant Hydraulic Blower Motor Solenoid?
- Common symptoms may include engine overheating, reduced heating or cooling performance, and the check engine light illuminating.
2. What can cause the Engine Coolant Hydraulic Blower Motor Solenoid Open Circuit/Short To Ground issue?
- Causes may include a faulty blower motor solenoid, damaged wiring, poor electrical connections, or a malfunctioning coolant system component.
3. How can I diagnose the source of the P1904 trouble code?
- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the blower motor solenoid and related wiring for damage, and testing the coolant system components for proper function.
4. What are the potential risks of ignoring OBDII code P1904?
- Ignoring this code can lead to overheating of the engine, potential damage to the cooling system components, and reduced overall vehicle performance.
5. Can I drive my vehicle with the Engine Coolant Hydraulic Blower Motor Solenoid issue?
- It is not recommended to drive the vehicle with this issue as it can lead to overheating and potential engine damage. It is best to address the problem promptly.
6. How can I repair the Engine Coolant Hydraulic Blower Motor Solenoid Open Circuit/Short To Ground problem?
- Repair may involve replacing the faulty blower motor solenoid, repairing damaged wiring or connections, and ensuring proper functioning of the coolant system components.
7. Are there any preventive maintenance tips to avoid OBDII code P1904 in the future?
- Regularly inspecting the cooling system components, checking for any signs of wear or damage, and addressing any issues promptly can help prevent this code from occurring.
8. Can a DIY enthusiast fix the Engine Coolant Hydraulic Blower Motor Solenoid issue?
- Depending on the skill level and experience, a DIY enthusiast may be able to address this issue by following repair guides and having the necessary tools and equipment.
9. How long does it typically take to repair the Engine Coolant Hydraulic Blower Motor Solenoid problem?
- The repair time can vary based on the extent of the issue and the availability of parts. It may take a few hours to a full day to complete the repair.
10. Is it necessary to reset the OBDII system after fixing the P1904 trouble code?
- Yes, it is recommended to reset the OBDII system after fixing the issue to clear the code and ensure proper monitoring of the vehicle's performance.
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