Error P1705 on Nissan: interpretation, causes and solutions

Fault code P1705 on cars Nissan - one of the most common problems associated with the operation of an automatic transmission. This error may occur on models Qashqai, X-Trail, Juke, Murano and others equipped with a variator Jatco or a classic “automatic”. Unlike many other codes, P1705 does not always indicate a serious breakdown, but it cannot be ignored: long-term driving with this error can lead to expensive gearbox repairs.

In this article we will take a closer look at what it means P1705what symptoms accompany it, and how to correctly diagnose the problem. You will find out whether it is possible to continue operating the car with this error, which components to check first, and when to contact service. We will pay special attention specifics of errors on variators Nissanwhere P1705 is often associated with faulty solenoids or mechanical belt wear.

What does error code P1705 mean on Nissan?

Code P1705 in the diagnostic system Nissan stands for "Ratio Control Solenoid Circuit Malfunction" (English) «Transmission Ratio Control Solenoid Circuit Malfunction»). This solenoid is responsible for smoothly changing the gear ratio in a variator or for shifting gears in a classic automatic transmission. When the transmission control unit (TCM) detects incorrect signals from the solenoid or an open circuit in its circuit, it records an error P1705 and can put the box into emergency mode.

In practice this means that:

• 🔧 A variator or automatic transmission may “hang” in one gear (usually 3rd or 4th).
• 🚗 The car loses its dynamics, jerks appear when accelerating.
• ⚠️ The indicator lights up on the dashboard «Check Engine» or «AT» (for automatic transmission).
• 🔄 In some cases, the box begins to “kick” when switching modes (D → R).

It is important to understand that P1705 - this is not a sentence, but a signal to action. In 30% of cases, the problem is solved by changing the oil in the variator or cleaning the solenoid contacts. However, if you ignore the error, it may lead to variator belt wear (in case CVT) or damage to clutches (in a classic automatic transmission).

The main causes of error P1705

Causes P1705 can be divided into three categories: electric, mechanical And software. Let's look at each of them in more detail.

1. Electrical faults

Most often, the error is associated with problems in the solenoid circuit:

• 🔌 Open or short circuit in the wires going to the solenoid.
• 🔋 Oxidation of contacts on the connector of the solenoid or control unit (TCM).
• 🔄 Malfunction of the solenoid itself (winding, movable core).
• 🔋 Eating problems (for example, low battery voltage).

2. Mechanical problems

If everything is fine with the electrics, the culprit may be:

• ⚙️ CVT belt wear (relevant for CVT).
• 🛢️ Contaminated or old oil in the box (leads to jamming of the solenoid).
• 🔧 Damage to the valve body (in classic automatic transmissions).
• 🔄 Bearing wear variator shaft.

3. Software glitches

Less often, but there are cases when P1705 appears due to:

• 💻 Control unit firmware failure (TCM).
• 🔄 Software incompatibilities after the update.
• 📡 Interference in the CAN bus (for example, due to a faulty speed sensor).

According to statistics from service centers, in 45% of cases the fault is electrician, in 40% - mechanics, and only in 15% - software errors. However, without diagnosis it is impossible to determine the exact cause.

Which Nissan models are most affected by P1705?

The most common error P1705 occurs on the following models:

- Nissan Qashqai J10/J11 (2007–2021) with CVT JF011E/JF016E.

- Nissan X-Trail T31/T32 (2007–2020) from CVT or a 6-speed automatic transmission.

- Nissan Juke F15 (2010–2019) - especially with engines HR16DE And MR16DDT.

- Nissan Murano Z51 (2014–2022) with CVT JF017E.

On these vehicles, the ratio control solenoids have design weaknesses, especially if the oil is not changed on time.

Symptoms of error P1705: how does the malfunction manifest itself?

Error P1705 rarely appears “on its own” - it is usually accompanied by noticeable changes in the behavior of the car. Here are the main signs to look out for:

Symptom	CVT (CVT)	Classic automatic transmission
Jerks during acceleration	✅ (especially at speeds of 40–60 km/h)	✅ (when switching 2→3 gears)
Stuck in one gear	✅ (usually at a “neutral” point)	✅ (usually in 3rd gear)
Increased engine speed	✅ (variator “slips”)	❌ (rare)
Noise or hum from the box	✅ (belt or bearing wear)	✅ (wear of friction clutches)
"Check Engine" light comes on	✅	✅

If you notice at least 2-3 symptoms from the table, the likelihood of an error P1705 is 80–90%. However, for an accurate diagnosis it is necessary to connect a scanner and check additional fault codes. For example, often together with P1705 appear:

• P0730 - incorrect gear ratio.
• P0740 — faulty torque converter locking.
• P0841 — problem with oil pressure in the box.

Diagnosing error P1705: step-by-step instructions

To pinpoint the cause P1705, follow this algorithm. To work you will need:

• 🔧 Multimeter (to check the solenoid circuit).
• 🔌 Diagnostic scanner (for example, Launch X431 or ELM327).
• 🛠️ A set of tools for removing the box tray.

Read all errors with a scanner (not only P1705)|Check the level and condition of the oil in the box|Measure the solenoid resistance (normal: 10–15 Ohms)|Ring the circuit from the TCM to the solenoid|Inspect the connectors for oxidation

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Step 1: Read Errors

Connect the scanner to the diagnostic connector OBD-II and read all fault codes. Please note:

• 🔧 Additional errors (For example, P0700 - transmission malfunction).
• 📊 Real-time parameters: oil pressure, box temperature, signals from solenoids.

Step 2: Checking the Oil

For CVT Nissan:

1. Warm up the box to 60–70°C (drive 10–15 km).
2. Place the car on a level surface.
3. Check the oil level through the dipstick (for CVT) or drain plug (for automatic transmission).
4. Assess the condition of the oil: if it is dark, has a burning smell or metal shavings, it needs to be replaced.

⚠️ Attention: In CVTs Nissan special oil is used NS-2 or NS-3. Fill with other liquids (for example, Dexron) is strictly prohibited - this will accelerate the wear of the belt.

Step 3: Checking the Solenoid

The gear ratio control solenoid is located in the gearbox valve body. To check it:

1. Remove the box pan (after draining the oil).
2. Disconnect the solenoid connector and measure its resistance with a multimeter. Normal value - 10–15 Ohm.
3. Check the circuit from the solenoid to the control unit (TCM) for an open circuit or short circuit.

If the solenoid resistance is lower 8 ohm or higher 20 ohm, it needs to be replaced. Also inspect the connector for corrosion or damaged contacts.

Step 4: Control Module (TCM) Diagnosis

If the solenoid and wiring are good, the problem may be in the control unit. Check:

• 🔌 Supply voltage on TCM (should be 12V).
• 🔄 Signals from sensors (speed, selector position, oil temperature).
• 💻 Firmware — sometimes flashing or resetting adaptations helps.

How to fix error P1705: from simple to complex

Repair methods depend on the cause of the problem. Below we present solutions from the simplest (and cheapest) to the complex.

1. Changing the oil in the box

If the oil is dirty or the level is below normal, do the following:

• 🛢️ Partial replacement (drain-fill, 4–5 liters for CVT).
• 🔄 Complete replacement with washing (recommended for heavy contamination).

For CVTs Nissan use only original oil NS-2/NS-3. After replacement, reset the box adaptations via the scanner (for example, with the command TCM Reset).

2. Cleaning or replacing the solenoid

If the solenoid is stuck or its resistance is abnormal:

• 🔧 Try washing the solenoid with carburetor cleaner (sometimes it helps with contamination).
• 🔄 If flushing does not help, replace the solenoid with a new one (part number for Qashqai J10: 31397-3MX0A).

3. Wiring repair

In case of a break or short circuit in the circuit:

• 🔌 Ring the wires from TCM to the solenoid.
• 🔧 Restore damaged areas or replace the tourniquet.

4. Flashing or replacing the TCM

If the problem is in the control unit:

• 💻 Update the firmware TCM (specialized equipment required).
• 🔄 As a last resort, replace the block (part number for X-Trail T32: 31001-JM00A).

5. Overhaul of the box

If the error P1705 accompanied by mechanical damage (variator belt wear, bearing destruction), you will need:

• ⚙️ Disassembling the box and replacing worn parts.
• 🔧 On CVTs Jatco The belt, cone pulleys and pump are often replaced.

⚠️ Attention: Major renovation CVT costs 80–150 thousand rubles (depending on the model). If the car's mileage is more than 200 thousand km, it is sometimes cheaper to install a contract box.

Is it possible to drive with error code P1705?

Short answer: possible, but not advisable. Long-term operation with this error leads to:

• 🔥 Overheating of the box (due to incorrect gear ratio).
• ⚙️ Accelerated belt wear (in a variator) or friction clutches (in an automatic transmission).
• 💥 Complete transmission failure (in advanced cases).

If the error appears for the first time and there are no obvious symptoms (jerking, loss of traction), you can go to the service center no more than 200–300 km. However:

• 🚗 Avoid sudden acceleration and high loads.
• 🔧 Monitor the oil level.
• 📊 Monitor the temperature of the box (norm: up to 90°C).

If the error P1705 accompanied by jerking, humming or loss of traction, the car cannot be driven - this can lead to expensive repairs.

Prevention of error P1705: how to avoid the problem?

To minimize the risk of P1705, follow these guidelines:

• 🛢️ Change the oil in the box every 60 thousand km (for CVT) or 80 thousand km (for automatic transmission). Use only original fluids.
• 🔧 Check the oil level once every 10 thousand km (especially if there are leaks).
• 🚗 Avoid aggressive driving (sharp starts, towing heavy trailers).
• 🔌 Monitor the condition of the wiring (especially in places where the harnesses rub against the body).
• 💻 Reset box adaptations regularly (once every 20 thousand km through a scanner).

Also note first signs of trouble:

• 🔄 Slight jerks when switching.
• 🔊 Extraneous sounds from the box.
• 🚗 Deterioration in acceleration dynamics.

If you notice any of this, immediately check the oil and connect the scanner. Early diagnosis allows you to fix the problem at minimal cost (for example, replacing the solenoid instead of major repairs).

Frequently asked questions (FAQ)

Can P1705 be caused by bad gasoline?

No, P1705 not directly related to fuel. However, if, due to low-quality gasoline, the engine is unstable (for example, troit), this may indirectly affect the operation of the box and provoke an error. Check the transmission first.

How much does it cost to fix error P1705?

The cost depends on the reason:

• 🛢️ Oil change: 3–8 thousand rubles.
• 🔧 Solenoid replacement: 5–15 thousand rubles (including labor).
• 💻 TCM flashing: 3-10 thousand rubles.
• ⚙️ Major repairs of CVT: 80–150 thousand rubles.

The exact amount can only be announced after diagnosis.

Is it possible to reset the P1705 code without repair?

It is possible, but this is a temporary solution. If you simply erase the error with a scanner, it will return after 10–100 km. Resetting makes sense only after the cause has been eliminated (for example, after changing the oil or solenoid).

What kind of oil should I pour into the Nissan variator for error P1705?

For CVTs Nissan (models before 2012) — NS-2, for newer ones (after 2012) - NS-3. Use of other oils (eg Dexron or ATF) is unacceptable and will accelerate the wear of the box.

Can error P1705 lead to emergency mode of the box?

Yes, if you ignore the problem, the control unit (TCM) can put the box into emergency mode (Limp Mode). In this case, the car will move only in 3rd gear (for automatic transmission) or with a fixed gear ratio (for CVT), which will limit the speed to 40–60 km/h.