Error P1705 on Nissan: transmission malfunction and solutions

Car owners Nissan often encounter an error P1705, which indicates problems with the transmission. This code appears on the dashboard or when scanned with a diagnostic scanner and may be accompanied by jerks, delays when shifting gears, or even the transmission going into emergency mode. Unlike other engine or electrical related errors, P1705 directly indicates problems with Automatic transmission or its management system.

The peculiarity of this error is that it can appear on older models (Nissan Primera, Almera Classic), and on modern crossovers (Qashqai, X-Trail T32). Moreover, the reasons for its occurrence vary from a banal low oil level to serious breakdowns of the solenoids or valve body. In this article we will look at all possible causes of P1705, diagnostic methods without visiting a service center and step-by-step instructions for troubleshooting - from the simplest actions to complex repairs.

What does error code P1705 mean on Nissan?

Code P1705 in the self-diagnosis system Nissan stands for "Shift solenoid circuit malfunction" (English) Transmission Control Solenoid Valve Circuit Malfunction). Depending on the car model and year of manufacture, the error may have additional clarifications, for example:

• 🔧 P1705-00 — general solenoid fault code;
• ⚡ P1705-35 - short circuit in the circuit;
• 🔌 P1705-37 — break or poor contact;
• 🛠️ P1705-39 — unstable signal from the solenoid.

Solenoids (solenoid valves) in Automatic transmission are responsible for controlling the flow of transmission fluid, which ensures smooth gear shifting. When Transmission ECU (TCM) detects incorrect operation of one or more solenoids, it activates an error P1705 and can put the box into emergency mode (Limp Mode). In this case, the car will only move in 3rd gear or completely block the shift.

It is important to understand that P1705 is not a death sentence, but a signal to action. In 30% of cases, the problem is solved by changing the oil or cleaning the contacts, but ignoring the error can lead to complete failure of the valve body or friction discswhich will require major repairs Automatic transmission costing from 80,000 rubles.

The main causes of error P1705

Reasons for appearance P1705 can be divided into three categories: mechanical, electric And software. Below is a list of the most common malfunctions, sorted by frequency of occurrence (based on data from service centers Nissan for 2020–2026):

On models Nissan Qashqai J10/J11 And X-Trail T31/T32 most often a mistake P1705 associated with solenoid No. 2 (Shift Solenoid B), which is responsible for changing 2–3 gears. On older cars (Almera N16, Primera P12) the problem usually lies in main TCM connector, where contacts oxidize over time.

Another common reason is incorrect TCM firmware. For example, after chip tuning or software updates through unofficial sources, a calibration conflict may occur, which leads to a false alarm. In this case, the unit needs to be re-flashed original software.

Symptoms of Error P1705: How to Recognize the Problem?

Error P1705 rarely appears “on its own” - it is usually preceded by noticeable changes in the behavior of the car. Here are the key symptoms that should alert you:

• 🚗 Jerks when shifting gears (especially from 1st to 2nd or from 3rd to 4th);
• ⏳ Switching delays (the box “thinks” for 2–3 seconds before changing gear);
• 🔄 Spontaneous switching to neutral or refusal to engage the gear;
• 🚨 Flashing "AT" or "Check Engine" icon on the dashboard;
• 🛑 Emergency mode (Limp Mode) — the car moves only in 3rd gear.

On Nissan Juke And Note with variator CVT error P1705 may appear as belt slippage when accelerating or vibration at speeds of 60–80 km/h. In this case, the problem is often related to pressure solenoid malfunction (Line Pressure Solenoid).

If you notice any of these symptoms, do not delay diagnosis. Long-term driving with faulty solenoids leads to:

⚠️ Attention: Increased wear of friction discs and bearings Automatic transmission, which in the future will require replacing the entire clutch package (cost from 25,000 ₽).

Diagnosing error P1705: step-by-step instructions

Before going to the service center, you can check primary diagnosis on your own. For this you will need:

• 🔧 Multimeter (to check the resistance of the solenoids);
• 🔍 Diagnostic scanner (for example, ELM327 or Launch CReader);
• 🛢️ Dipstick for checking the oil level in Automatic transmission.

Algorithm of actions:

1. Count all errors. Besides P1705, there may be accompanying codes, for example:
   • P0730 — incorrect gear shifting;
   • P0740 — faulty torque converter locking;
   • P0750 - problem with solenoid A.
2. Check the oil level and condition. On Nissan with Automatic transmission RE0F10A (installed on Qashqai, X-Trail) oil should be red no burnt smell. If the fluid is dark or contains metal particles, replacement is required.
3. Ring the solenoids. Disconnect the valve body connector and measure the resistance of each solenoid. Normal values for most models Nissan:
   • Solenoid A: 10–14 ohms;
   • Solenoid B: 10–14 ohms;
   • Pressure solenoid: 4-6 ohms.

If the solenoid resistance is outside the normal range or equal to 0 (short circuit) / ∞ (break), the part must be replaced. On Nissan Tiida And Almera N16 solenoids often “stick” due to old oil - in this case you can try to wash them special liquid (For example, Liqui Moly ATF Reiniger).

How to fix error P1705: from simple to complex

Repair methods depend on the cause of the problem. Below is the algorithm of actions, from the cheapest and simplest to capital intensive:

1. Changing the automatic transmission oil and filter

If the oil in the box has not been changed for more than 60,000 km or has signs of aging (dark color, burnt smell), replace first. For Nissan It is recommended to use original oil Nissan Matic Fluid S or analogues (Idemitsu ATF Type-J, Ravenol ATF J1).

On models with CVT variator (For example, Juke, Qashqai J11) required complete oil change using the spill method (at least 10–12 liters), since partial replacement does not remove deposits from the valve body.

2. Cleaning contacts and connectors

Oxidation of contacts in the solenoid connector or TCM - one of the most common reasons P1705. To fix the problem:

1. Remove the connector from the valve body (located on the body Automatic transmission).
2. Clean your contacts alcohol solution or special liquid (Kontakt 60).
3. Check the integrity of the wiring for chafing or short circuit.

On Nissan X-Trail T31 often oxidizes ground wire, coming from Automatic transmission to the body. It needs to be cleaned and processed lithol.

3. Replacing solenoids

If the continuity test shows a faulty solenoid, it must be replaced. On most models Nissan solenoids are sold as separate parts (part number e.g. 31326-31X00 for Qashqai J10) or assembled with a hydraulic unit. Average cost of one solenoid - 2 000–4 000 ₽.

To replace you will need:

• Remove the pan Automatic transmission;
• Disconnect the hydraulic unit;
• Remove the faulty solenoid and install a new one;
• Make adaptation Automatic transmission using a diagnostic scanner.

4. Repair or replacement of the valve body

If the problem lies in the valve body itself (for example, the channels are clogged or the plungers are worn out), it will be required disassembly and washing or complete replacement. On Nissan Teana J32 And Murano Z51 The valve body often fails due to the use of non-original oil.

The cost of a new hydraulic unit is from 20 000 ₽, but in most cases it can be repaired (repair price - 8,000–15,000 ₽).

5. Replacement of the TCM control unit

If the diagnostics show a malfunction TCM (for example, there is no power to the connector or the unit does not respond to scanner requests), it will have to be replaced. Original TCM for Nissan costs from 30 000 ₽, but you can find a used version from disassembly (about 10,000 ₽).

⚠️ Attention: When replacing TCM You will need to update it to the VIN of your car. It is impossible to do this on your own - contact a specialized service.

Prevention of error P1705: how to avoid problems?

To minimize the risk of P1705, follow these guidelines:

• 🔄 Change the automatic transmission oil every 60,000 km (or once every 4 years if the mileage is low). For CVTs CVT reduce the interval to 40,000 km.
• 🚫 Avoid aggressive driving (sharp starts, towing heavy trailers) - this increases the load on the solenoids.
• 🔌 Check your contacts regularly on connectors Automatic transmission And TCM, especially after washing the engine.
• 🔧 Use only original oil or certified analogues. For example, for Nissan Pathfinder R51 suitable only Matic Fluid D.
• 📱 Watch out for bugs using a diagnostic adapter (for example, ELM327 + application Torque).

On vehicles with CVT variator (Nissan Juke, Qashqai J11) additionally recommended:

• Check oil level every 10,000 km (variators are sensitive to oil starvation);
• Avoid long-term driving at high speeds (more than 4,000 rpm);
• Do not tow other vehicles.

FAQ: Frequently asked questions about error P1705

Напряжение на клеммах при заглушённом двигателе: 12,6–12,8 В
Напряжение при работающем двигателе: 13,8–14,4 В