P1774 Nissan Code - Low Coast Brake Solenoid Valve Function
Quick Answer
The P1774 Nissan diagnostic trouble code (DTC) specifically relates to the Low Coast Brake Solenoid Valve Function. Common causes include Faulty low coast brake solenoid valve, Electrical issues such as wiring harness damage or connections, Low transmission fluid levels or dirty fluid. 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
- P1774 Nissan indicates Low Coast Brake Solenoid Valve Function.
- Common causes
- Common causes include Faulty low coast brake solenoid valve, Electrical issues such as wiring harness damage or connections, Low transmission fluid levels or dirty fluid.
- 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.
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Code P1774 Nissan Description
The P1774 Nissan diagnostic trouble code (DTC) specifically relates to the Low Coast Brake Solenoid Valve Function. This code indicates that there is a malfunction or issue with the solenoid valve that controls the low coast braking function in the vehicle's transmission system. The low coast braking feature is responsible for assisting in downshifting smoothly and efficiently when the vehicle is decelerating or coming to a stop. When this solenoid valve fails or malfunctions, it can lead to various issues with the transmission system, affecting the vehicle's overall performance, fuel efficiency, and drivability.
Common Causes of P1774 Nissan
- Faulty low coast brake solenoid valve
- Electrical issues such as wiring harness damage or connections
- Low transmission fluid levels or dirty fluid
- Mechanical damage or wear in the transmission system
- Engine control module (ECM) malfunction
Symptoms of P1774 Nissan
- Erratic shifting patterns
- Harsh downshifting
- Delayed engagement of gears
- Transmission slipping
- Transmission overheating
How to Fix P1774 Nissan
- Diagnose the specific cause of the issue by performing a comprehensive transmission system check.
- Inspect the low coast brake solenoid valve for any signs of damage or malfunction.
- Replace the faulty solenoid valve with a new one that meets manufacturer specifications.
- Check and replace any damaged wiring harness or connections related to the solenoid valve.
- Refill the transmission fluid and ensure it is at the correct level and condition.
Cost to Fix P1774 Nissan
The typical repair costs for addressing the P1774 Nissan code related to the Low Coast Brake Solenoid Valve Function can vary depending on the extent of the issue and the specific repairs needed. On average, the cost of replacing a solenoid valve and addressing related transmission issues can range from $200 to $600, including parts and labor. However, it is important to note that diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It is advisable to obtain quotes from reputable auto repair shops to get a more accurate estimate for the repair.
Tech Notes for P1774 Nissan
2003–2010 Nissan RE5R05A Transmission Factory Service Bulletin OBDII Code P1774
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Frequently Asked Questions about P1774 Nissan Code
1. What are the common symptoms of OBDII code P1774 in a Nissan related to the Low Coast Brake Solenoid Valve function?
Symptoms may include harsh shifting, transmission slipping, poor acceleration, and the vehicle going into "limp mode."
2. What are the possible causes of OBDII code P1774 in a Nissan?
Common causes include a faulty low coast brake solenoid valve, damaged wiring or connectors, low transmission fluid levels, or internal transmission issues.
3. How can I diagnose the low coast brake solenoid valve in my Nissan when troubleshooting OBDII code P1774?
You can use a multimeter to test the solenoid for continuity and proper resistance values. Additionally, inspect the wiring and connectors for any signs of damage.
4. Can driving with OBDII code P1774 in a Nissan cause further damage to the vehicle?
Continued driving with this code may lead to further transmission issues, reduced fuel efficiency, and potential damage to other transmission components.
5. How do I repair OBDII code P1774 in a Nissan related to the Low Coast Brake Solenoid Valve?
Repair options may include replacing the low coast brake solenoid valve, repairing damaged wiring or connectors, ensuring proper transmission fluid levels, and addressing any internal transmission problems.
6. Is it safe to continue driving my Nissan with OBDII code P1774 present?
It is not recommended to drive your vehicle with this code present, as it can lead to further transmission issues and potentially unsafe driving conditions.
7. Can I reset OBDII code P1774 in my Nissan without fixing the underlying issue?
While you can clear the code temporarily, it will likely return until the root cause, such as the low coast brake solenoid valve issue, is addressed.
8. How much does it typically cost to repair OBDII code P1774 in a Nissan at a professional mechanic or dealership?
Costs can vary depending on the exact issue and location, but repairs for this code may range from $200 to $500 or more, including parts and labor.
9. Are there any preventive maintenance steps I can take to avoid encountering OBDII code P1774 in my Nissan?
Regularly checking and maintaining your vehicle's transmission fluid levels, conducting routine inspections of wiring and connectors, and addressing any transmission issues promptly can help prevent this code from occurring.
10. Will OBDII code P1774 cause my Nissan to fail an emissions test?
Yes, OBDII code P1774 can cause your Nissan to fail an emissions test, as it indicates a malfunction related to the transmission system.
Discuss the causes and fixes for P1774 Nissan OBDII Code
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How quick does this need to be fixed? Don't have the money right now does it cause electrical issues that'll drain the battery or worse?
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What model and year is your vehicle? do you have any other symptoms, besides the engine light? Problems with the Low Coast Brake Solenoid Valve (P1774 Code) usually wont cause battery issues.
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It's a 2006 Nissan Titan. The light and twice it wouldn't reverse. If you turn it off and restart it, it does reverse. It's not an every day truck so wanted to get battery replaced but was gonna wait if it could possibly be draining the battery.
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It won't drain the battery, but it will cause the no reverse issues. Before replacing any parts, make sure you check the transmission fluid level and condition.
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What model and year is your Nissan? You may have to replace the transmission Valve Body and that can cost you around $1000
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Hi, i've Nissan Murano 2006 SE,
1. My broke down and was not running in driver mode.
2. Right now, i've changed the alternator, car is running now but i'm feeling like transmission problem in it.
3. On scan i got code P1774 transmission etc..
4. Car RMP is so high. Car couldn't go above 120 even with full escalator 5.5 rpm.Could it be due to transmission failure or due to transmission fluid? Please help me, i'm in great fix now. I'm driving this car for 2 days on same condition. What should i do now check the transmission fluid first?
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Unfortunately, more than likely is a transmission failure, but make sure you check the transmission fluid level and condition.
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i have a 05 pathfinder, getting the fault code(p1774) 4 months after a transmission rebuild. But the car is shifting as usual.
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Have you tried clearing the code? I suggest clearing the code, if the code persist you may have to take it back to the place the rebuilt the transmission. The P1774 code is for the Low coast brake solenoid valve which is part of the "Transmission Valve Body" inside the transmission.
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I have Nissan Xterra 2012. Mechanic open dashboard to fix AC leakage after that I am getting P1774 code. 4x4 light is ON and 4x4 yellow display is blank.
One time from computer they reset the code. I switched to 4H 4L and 2 wheels and everything was normal until I turn off the car and turn back on.
I believe there is some low voltage or lose connector behind dashboard. Any suggestion will be much appreciated.
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Unfortunately, there is nothing in the factory service manual that indicates a loose connector, or anything disconnected behind the dashboard. The Low Coast Brake Solenoid Valve is inside the transmission and is controlled by the Transmission Control Module (TCM), which is also inside the transmission. My only suggestion is to check the transmission fluid level, clear the codes and drive your Xterra for a few miles, then check for codes again.
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