Error code P1701 on cars Nissan - one of the most common problems associated with the operation of an automatic transmission. This signal indicates a malfunction in the transmission control system, but its appearance does not always mean a major repair. Often the problem lies in small things: from oxidized contacts to software failure. However, it cannot be ignored - long-term driving with an active error can lead to failure of the solenoids, valve body, or even the entire automatic transmission.

In this article we will look at what exactly is hidden behind the code. P1701what models Nissan most susceptible to this malfunction (spoiler: Qashqai, X-Trail And Teana leaders in call statistics), and how to independently diagnose the problem without visiting a service center. You will also learn which actions can aggravate the situation and which ones can help you save on repairs. If your car suddenly stops shifting gears or the check light comes on with this code, read on.

What does error code P1701 mean on Nissan?

Code P1701 in the diagnostic system Nissan stands for "Transmission control circuit malfunction" (English) Transmission Control Module (TCM) Communication Error). This is a common signal that may indicate:

  • 🔌 Problems with wiring or connectors between automatic transmission control unit (TCM) And Engine computer (ECM).
  • 🖥️ Failures in TCM or ECM software (for example, after unsuccessful chip tuning).
  • ⚙️ Mechanical faults inside the gearbox (wear of solenoids, clogging of the valve body).
  • 🔋 Low voltage in the on-board network (for example, due to a discharged battery).

The peculiarity of this error is that it appears frequently along with other codes, such as P0700 (general automatic transmission failure) or P0730 (incorrect gear shifting). If the scanner only displays P1701, the problem is most likely electrical or software. If there are accompanying codes, get ready for a more in-depth diagnosis.

For example, on Nissan Qashqai J10 with variator JF011E error P1701 often accompanied by jerks during acceleration. And on X-Trail T31 with a classic automatic RE0F10A it can manifest itself as freezing in one gear. This is due to the peculiarities of TCM firmware in different models.

📊 What Nissan model do you have?
  • Qashqai
  • X-Trail
  • Teana
  • Juke
  • Other

Reasons for error P1701

To effectively resolve an error, you need to understand its root cause. We have collected the most common cases from the practice of car services, ranking them by frequency of occurrence:

Reason Frequency (%) Models where it occurs most often
Oxidation of contacts in TCM/ECM connectors 35% Qashqai J10/J11, X-Trail T31/T32
TCM firmware failure after battery disconnection 25% Teana J32, Murano Z51
Malfunction of automatic transmission solenoids 20% Pathfinder R51, Navara D40
Voltage drop in the on-board network 15% Juke F15, Note E12
Mechanical wear of the valve body 5% Patrol Y61, Terrano R20

Important: on Nissans with CVTs, error P1701 in 60% of cases is associated with a malfunction of the speed sensor or its circuit. On classic automatic transmissions, the solenoids or valve body are most often to blame.

Let's look at each reason in more detail:

  • 🔌 Oxidation of contacts: Over time, the TCM (usually located under the center console) and ECM connectors become coated with oxides, especially if the vehicle is driven in high humidity conditions. This results in an intermittent signal and an error. Characteristic sign: the error appears periodically, often after rain or washing.
  • 🖥️ Firmware crashes: If the battery was disconnected while the ignition was running or chip tuning was carried out in a “makeshift” way, the TCM may “forget” the calibration data. In this case, the box goes into emergency mode (Limp Mode).
  • ⚙️ Solenoids and valve body: Worn or clogged solenoids lead to incorrect oil pressure in the automatic transmission. The TCM detects a discrepancy between the commanded and actual parameters and generates an error. Plays a similar role on CVTs pressure regulating valve.
Where is the automatic transmission control module (TCM) located?

On most Nissans, the TCM is located under the center console, next to the gearshift lever. For example:

- On Qashqai J11 - under the plastic cover to the left of the lever.

- On X-Trail T32 - behind the glove compartment, next to the ECM.

- On Teana J32 - under the rear of the central tunnel.

To get to the connectors, you usually need to remove the plastic trim and move the carpet.

Symptoms of error P1701

Error P1701 rarely appears “on its own” - it is usually accompanied by noticeable changes in the behavior of the car. Here are the key signs to look out for:

  • 🚗 Jerks when shifting gears (especially from 1st to 2nd or when braking).
  • 🛑 Stuck in one gear (for example, the transmission gets stuck in 3rd and does not shift up/down).
  • ⚡ Enabling emergency mode (Limp Mode): the “check” light is on on the instrument panel, the transmission only works in 3rd gear.
  • 🔄 Switching delays (for example, after pressing the gas, the gear changes within 2-3 seconds).
  • 🚨 Extraneous sounds out of the box (grinding, humming) - this is already an alarming signal of mechanical problems.

On Nissan with CVT (For example, Juke or Qashqai with JK0) error P1701 often manifests itself slipping at start or “kicks” during acceleration. On classic automatic transmissions (for example, RE4F04B in Pathfinder) — hard blows when switching.

⚠️ Attention: If together with P1701 the indicator came on «AT OIL TEMP» (automatic transmission oil temperature), stop immediately and turn off the engine. This is a sign of overheating of the box, and further movement may lead to its failure.

Interesting fact: on Nissan Almera N16 with automatic transmission DP0 error P1701 sometimes occurs due to faulty throttle position sensor. In this case, the scanner may not show errors in the TPS - only in the transmission.

Diagnosing error P1701: step-by-step instructions

Before going to the service center, you can conduct initial diagnostics yourself. For this you will need:

  • 🔧 Multimeter (to check voltage).
  • 🔍 Diagnostic scanner (for example, ELM327 or Launch CReader).
  • 🧰 Socket wrench set (to access TCM).
  • 📌 WD-40 or contact cleaner (for example, CRC Contact Cleaner).

Sequence of actions:

1. Connect the scanner and check for related errors

2. Inspect the TCM and ECM connectors for oxidation

3. Check the voltage on the battery (should be 12.6–14.4 V)

4. Reset errors and test the car in motion

5. If the error returns, check the TCM power circuits-->

  1. Count all the mistakes:

    Connect the scanner and record everything fault codes. If except P1701 There is P0705 (range sensor circuit malfunction), the problem may be selector lever or its wiring.

  2. Check TCM and ECM connectors:

    Disconnect the connectors, clean the contacts WD-40 or a special spray. Please note green coating is the oxidation of copper. After cleaning, apply dielectric grease (For example, Liqui Moly Kupfer-Spray).

  3. Measure voltage:

    Check the voltage on the battery with the ignition off and on. If it is lower 12 V, charge the battery or check the generator. Low voltage may cause the TCM to malfunction.

  4. Reset adaptations:

    On some models (for example, Qashqai J11) After cleaning the contacts, you need to reset the box adaptations. To do this:

    1. Сбросьте ошибки сканером.

    2. Заглушите двигатель, выньте ключ на 10 минут.
    

    3. Заведите автомобиль и дайте поработать на холостых 3-5 минут.
    

    4. Проедьте 5-10 км в щадящем режиме (без резких ускорений).

If after these steps there is an error P1701 disappeared, the problem was in contacts or adaptations. If not, a more in-depth diagnosis is required.

1. Stop the engine.

2. Press the brake pedal and hold it for 5 seconds.

3. Move the selector to position D, hold for 5 seconds.

4. Repeat for positions N And R.

This resets the calibration of the input shaft position sensor.-->

How to fix error P1701: from simple to complex

Repair methods depend on the cause of the problem. We have arranged them in ascending order of complexity and cost:

1. Clear contacts and reset errors

The simplest and cheapest method that helps in 30-40% of cases. Detailed instructions:

  • 🔧 Disconnect the negative battery terminal for 15 minutes (this will clear temporary errors in the TCM memory).
  • 🔍 Remove the plastic lining of the center tunnel to get to the TCM.
  • 🧴 Clean the connector contacts CRC Contact Cleaner and blow with compressed air.
  • 🔄 Connect the battery, reset the errors with the scanner and test the car.

2. Flashing the TCM control unit

If the error appears after disconnecting the battery or chip tuning, you may need to firmware update. This is relevant for:

  • 📌 Nissan Qashqai J11 (variator JK0).
  • 📌 X-Trail T32 (automatic transmission RE0F10D).
  • 📌 Teana J32 (variator JF016E).

For flashing you need special software (For example, Nissan Consult or XPROG) and firmware files for a specific model. It is not recommended to do this yourself - a recording error can damage the TCM.

3. Replacing solenoids or valve body

If the diagnostics showed a malfunction of the solenoids (codes P0740, P0750), they can be replaced separately. Cost of a set of solenoids for RE0F10A - about 8 000–12 000 ₽. The hydraulic unit will cost more: 20 000–35 000 ₽.

CVTs often fail pressure regulating valve (pressure control solenoid). Replacing it costs 5 000–7 000 ₽, but requires removing the pan and changing the oil.

4. Replacement of the TCM control unit

If the TCM is “burned out” or cannot be flashed, it will have to be replaced. Prices:

  • 💰 Used TCM — 5 000–15 000 ₽ (risk of purchasing a faulty unit).
  • 💰 New TCM - 30 000–60 000 ₽ (original from Nissan).
  • 💰 Refurbished TCM - 15 000–25 000 ₽ (best option).
⚠️ Attention: When replacing the TCM with Nissan with immobilizer (For example, Teana J32) new block needed tie to the car through diagnostic equipment. Without this, the engine will not start.

What not to do with error P1701

Some actions may make the problem worse or lead to costly repairs. That's what absolutely not recommended:

  • 🚫 Ignore the error and continue driving in emergency mode. This leads to accelerated wear of clutches and solenoids.
  • 🚫 Reset errors without eliminating the cause. If the problem is in the wiring or mechanics, it will return and may cause new problems.
  • 🚫 Disassemble the automatic transmission yourself without experience. Incorrect assembly of the variator or automatic transmission is guaranteed to damage the transmission.
  • 🚫 Buy used solenoids or TCM without checking. There is a high risk of getting a block with the same problems.
  • 🚫 Operate a car with a low oil level in the automatic transmission. This is the main reason for failure of variators JK0 And JF011E.

It is especially dangerous to ignore the error on cars with CVTs. For example, on Nissan Juke with JK0 riding with P1701 within 1–2 weeks may lead to variator belt wear, and replacing it will cost 50 000–80 000 ₽.

💡

If after cleaning contacts and resetting errors P1701 appears again, do not delay your visit to the service. Diagnostics using professional equipment (for example, Nissan Consult III Plus) costs 1,500–2,500 rubles, but will help avoid repairs costing tens of thousands.

Preventing error P1701

To minimize the risk of P1701, follow these guidelines:

  • 🔧 Check the automatic transmission oil level regularly (every 10,000 km). On CVTs Nissan oil needs to be changed every 60,000 km (despite claims of a "maintenance free" box).
  • 🔋 Monitor the on-board voltage. If the battery is low (voltage below 12V), the TCM may not operate correctly.
  • 🚿 Avoid high-pressure engine washing. Water entering TCM connectors is a common cause of contact oxidation.
  • 🔄 Do not disconnect the battery while the ignition is running. This may cause the TCM firmware to fail.
  • 🛠️ Use only original oil for automatic transmission. For example, for CVTs Nissan — NS-2 or NS-3.

On cars with high mileage (150,000+ km) it is recommended every 30,000 km carry out Solenoid diagnostics and check the condition of the oil for metal shavings. This will help to detect wear of clutches or bearings in time.

For owners Nissan Qashqai J10 And X-Trail T31 with automatic transmission RE0F10A good to know: these boxes are sensitive to overheating. Install an additional automatic transmission oil cooler if you often drive with a trailer or in traffic jams.

Frequently asked questions (FAQ)

Is it possible to drive with error code P1701?

Short-term (1-2 days) - yes, but only if the box does not go into emergency mode. Long-term driving with this error leads to accelerated wear of solenoids and clutches. On CVTs the risk is especially high: the belt may break.

How much does it cost to repair error code P1701?

The cost depends on the reason:

  • Cleaning contacts - 500–1 500 ₽.
  • TCM flashing - 3 000–8 000 ₽.
  • Replacing solenoids - 8 000–15 000 ₽.
  • Valve block repair - 15 000–30 000 ₽.
  • TCM replacement - 15 000–60 000 ₽.

Is it possible to reset P1701 without a scanner?

Yes, by disconnecting the negative terminal of the battery for 10-15 minutes. However, if the cause is not eliminated, the error will return. On some models (for example, Teana J32) after such a reset it may be necessary throttle calibration.

What kind of oil should I fill in a Nissan automatic transmission with error P1701?

Depends on the type of box:

  • For CVTs (JK0, JF011E) — Nissan NS-2 or NS-3.
  • For classic automatic transmissions (RE0F10A, DP0) — Nissan Matic S or Matic D.

After changing the oil, be sure to reset the transmission adaptations!

Where is the Transmission Control Module (TCM) located on my Nissan?

The exact location depends on the model:

  • Qashqai J11 — under the plastic cover to the left of the gearshift lever.
  • X-Trail T32 — behind the glove compartment, next to the ECM.
  • Teana J32 - under the rear of the central tunnel.
  • Juke F15 — under the hood, next to the battery.

To access the TCM you usually need to remove the plastic trim and pull back the carpet.