Error P0725 on Nissan Murano Z50: a complete analysis of the causes and solutions

Fault code P0725 on Nissan Murano Z50 (2009–2014) is one of those mistakes that can baffle even experienced car owners. It signals problems at work Transmission input shaft speed sensor, but in practice the reasons may lie deeper - from banal contamination of contacts to serious malfunctions in the transmission. Unlike engine errors, which often appear immediately (for example, P0300 — misfires), P0725 can remain “dormant” for a long time, appearing only under certain conditions: sharp acceleration, coasting or after a long stay.

Owners Murano Z50 with variator JF011E encounter this error more often than owners of models with a classic automatic transmission. The fact is that the variator is more sensitive to the quality of the signal from the sensors, and its electronics react more strictly to the slightest deviations. If you ignore P0725, over time this can lead to jerks when changing gears, loss of power and even emergency operation of the gearbox. In this article, we will analyze all possible causes of the error, diagnostic methods (including testing without a scanner) and step-by-step repair instructions - from simple steps to complex procedures.

What does error P0725 mean on Nissan Murano Z50

Code P0725 stands for «Engine Speed Input Circuit Malfunction» — malfunction of the engine speed input signal circuit. However, in the context Murano Z50 this code more often indicates problems with transmission input shaft speed sensor (Input Shaft Speed Sensor, ISS). This sensor is responsible for transmitting shaft speed data from the engine to the transmission, and its incorrect operation leads to failures in the gear shift logic.

Feature of the error P0725 on Nissan Murano Z50 is that it can appear either constantly or episodically. For example:

• 🔹 When the engine starts cold (disappears after warming up).
• 🔹 When driving at speeds above 80 km/h.
• 🔹 After driving through off-road or deep puddles.
• 🔹 During sudden braking or acceleration.

It is important to understand that P0725 - this is not a verdict, but only an indication of a problem in the sensor circuit. In 30% of cases, the sensor itself is to blame, in 40% it is the wiring or connectors, and in the remaining 30% it is mechanical faults in the box or failures in the control unit (TCM). Without an accurate diagnosis, replacing the sensor at random is a waste of money.

The main causes of error code P0725

Causes P0725 on Nissan Murano Z50 can be divided into three groups: electric, mechanical And software. Let's look at each in detail.

1. Electrical problems

• 🔌 ISS sensor malfunction (Input Shaft Speed Sensor). Over time, its winding or magnetic core wears out, resulting in signal distortion.
• 🔌 Oxidation or broken wiring. The wires from the sensor to the control unit often become chafed or damaged due to vibrations.
• 🔌 Poor contact in the connector. Moisture, dirt, or corrosion in the sensor connector or TCM may cause an intermittent signal.
• 🔌 Short circuit in the sensor power circuit (for example, due to insulation damage).

2. Mechanical problems

• ⚙️ Sensor gear wear on the input shaft of the box. If the gear teeth are worn, the sensor cannot read the signal correctly.
• ⚙️ Sensor contamination with metal shavings. In the variator JF011E Over time, chips accumulate and can stick to the sensor magnet.
• ⚙️ Damage to input shaft or box bearings, which leads to runout and an unstable signal.

3. Software glitches

• 💻 Errors in the TCM firmware (Transmission Control Module). On Murano Z50 before the 2012 release, there were software “glitches” that led to false positives P0725.
• 💻 Firmware incompatibility after replacing the TCM unit or sensor (if non-original spare parts were used).

According to statistics from service centers, most often the sensor itself (35% of cases) or the wiring (30%) is to blame. Mechanical problems and software glitches are less common, but they are more difficult to diagnose.

How to Diagnose P0725 Without a Scanner

Not everyone has access to a diagnostic scanner, but that doesn't mean you can't check the cause yourself P0725. Here are step by step instructions for Nissan Murano Z50:

1. Checking the ISS sensor manually

The input shaft speed sensor is located on the gearbox housing (engine side). To get to it:

1. Remove the engine protective cover (if equipped).
2. Find the sensor - it is attached with one bolt and has a two-pin connector.
3. Disconnect the connector and check for oxidation or damage.
4. Measure the sensor resistance with a multimeter (should be within 200–1000 Ohm).

2. Wiring check

Use the multimeter in “dial” mode:

• 🔧 Check the integrity of the wires from the sensor to the TCM unit (usually located under the center console).
• 🔧 Make sure there is no short circuit to ground.
• 🔧 Check the voltage at the contacts of the sensor connector with the ignition on (there should be 5 V on one of the contacts).

3. Visual inspection

Please note:

• 🔍 Traces of oil or antifreeze near the sensor (may indicate a seal leak).
• 🔍 Metal shavings on the sensor body (indicates the wear of the box).
• 🔍 Cracks or damage on the sensor itself.

If the sensor and wiring are ok, but the error remains, the problem may lie in the mechanical part of the transmission or the TCM unit.

Check ISS sensor resistance|Inspect connector for oxidation|Check wiring for open|Check sensor supply voltage|Inspect sensor for chips-->

Step-by-step instructions for replacing the ISS sensor

If diagnostics show that the sensor is at fault, you can replace it yourself. For Nissan Murano Z50 Original sensors with article numbers are suitable:

• 32535-31X00 (for models up to 2012),
• 32535-31X01 (for models after 2012).

You can also use analogues from Hitachi or Denso, but they must be compatible with the CVT JF011E.

Required tools:

• 🔧 10 mm socket wrench.
• 🔧 Flat blade screwdriver (for removing the connector).
• 🔧 Torque wrench (optional, for precise bolt tightening).
• 🔧 Contact cleaner (eg. CRC 2-26).

Replacement process:

1. Disconnect the negative terminal of the battery.
2. Remove the engine protective cover (if installed).
3. Locate the ISS sensor on the box housing (flywheel side).
4. Disconnect the connector by pressing the latch.
5. Unscrew the sensor mounting bolt (do not lose the O-ring!).
6. Install the new sensor, lubricating the O-ring with transmission oil.
7. Tighten the bolt to torque 8–10 Nm.
8. Connect the connector and check for errors.

After replacing the sensor, the error must be reset. If you don't have a scanner, you can disconnect the battery for 10-15 minutes (this will clear errors in the ECU memory).

What should I do if the error remains after replacing the sensor?

If P0725 keeps appearing, check:

1. The quality of the contact in the connector (perhaps the contacts were bent during connection).

2. Condition of the wiring from the sensor to the TCM (may be open or short circuited).

3. Compatibility of the new sensor with your model (sometimes analogues give false signals).

4. The presence of mechanical problems in the box (shaft gear wear, chips in the oil).

If everything is in order, but the error remains, diagnostics of the TCM unit or CVT is required.

What to do if P0725 is caused by a faulty transmission

If replacing the sensor and checking the wiring did not help, the problem may lie in the mechanical part of the box or the control unit. In this case, more serious action will be required.

1. Checking the input shaft gear

Over time, the teeth of the gear from which the ISS sensor reads the signal can wear out. This results in an unstable signal and an error P0725. To check the gear:

• 🔧 Remove the box tray and inspect the magnet (if it is clogged with shavings, this is an indirect sign of wear).
• 🔧 Use an endoscope to inspect the gear on the input shaft (if the teeth are worn or damaged, the gearbox will need to be repaired).

2. TCM diagnostics

Transmission control unit (Transmission Control Module) may produce false errors due to:

• 💻 Malfunctions of internal circuits.
• 💻 Outdated firmware (on Murano Z50 Until 2012, there were bugs that were fixed by updates).
• 💻 Damage from moisture or overheating.

Checking the TCM requires special equipment, but indirect signs of its malfunction:

• 🔴 Error P0725 appears along with other codes (for example, P0700, P0730).
• 🔴 The box goes into emergency mode for no apparent reason.
• 🔴 After resetting the errors, they appear again after a few kilometers.

3. Checking the level and condition of the oil in the variator

Low oil level or contamination with metal shavings can cause unstable operation of the sensors. For Nissan Murano Z50 with variator JF011E:

• 🛢️ Check the oil level on a warm box (should be between the marks HOT on the dipstick).
• 🛢️ Assess the color and smell of the oil: if it is black or smells like burning, it needs replacement.
• 🛢️ When changing the oil, be sure to wash the pan and replace the filter.

Cost of repairs and where is the best place to get them repaired

Cost of fixing the error P0725 on Nissan Murano Z50 depends on the reason and location of the repair. Below is an indicative price table (for Moscow and regions for 2026):

Type of work	Cost (RUB)	Lead time
Diagnostics (scanner + wiring check)	1 500 – 3 000	30–60 minutes
Replacing the ISS sensor (spare part + labor)	4 000 – 8 000	1–2 hours
Wiring repair (soldering, connector replacement)	2 500 – 5 000	2–3 hours
Changing the oil in the variator (partial)	5 000 – 10 000	1.5–2 hours
Diagnostics and firmware of the TCM unit	8 000 – 15 000	3–5 hours

Where is the best place to repair:

• 🔧 Official dealer: warranty on work, but high cost (use original spare parts).
• 🔧 Specialized services for CVTs: often cheaper than the dealer, but it is important to choose a trusted center with diagnostic equipment JF011E.
• 🔧 DIY repair: Suitable for replacing sensor or wiring, but requires skill.

⚠️ Attention: If you are offered to “reset an error” without diagnostics for 500 rubles, run away from such a service. P0725 will not go away on its own, and ignoring the problem will lead to costly repairs to the variator.

Prevention of error P0725 on Nissan Murano Z50

To minimize the risk of P0725, follow these guidelines:

1. Regular maintenance of the variator

• 🔄 Change the oil in the variator every 60,000 km (or once every 4 years).
• 🔄 Use only original oil Nissan CVT Fluid NS-2 (for Murano Z50 before 2012) or NS-3 (for models after 2012).
• 🔄 Wash the pan and magnets every time you change the oil.

2. Electrical condition monitoring

• 🔌 Periodically clean the sensor contacts and connectors of the TCM unit (once a year).
• 🔌 Avoid washing the engine under high pressure - water may get into the connectors.
• 🔌 Check the integrity of the wiring at every maintenance (especially in areas of rubbing).

3. Careful operation

• 🚗 Avoid sudden starts and braking (increase the load on the variator).
• 🚗 Do not tow heavy trailers (maximum load for Murano Z50 - 1,500 kg).
• 🚗 Warm up the box before driving in the cold season (let the engine run for 2-3 minutes).

If you often drive off-road or in high humidity conditions, it is recommended to check the condition of the sensors and connectors every six months.

FAQ: Frequently asked questions about error P0725

Is it possible to drive with P0725?

Short term - yes, but not recommended. The error indicates an unstable signal from the sensor, which can lead to jerking, loss of power, or the box going into emergency mode. Long ride with P0725 accelerates wear of the variator.

Why does P0725 only appear when it is cold?

This is a typical sign of oxidation of the contacts in the sensor or TCM connector. When warmed up, the moisture evaporates and contact is temporarily restored. Try cleaning the connectors with contact cleaner (eg Liqui Moly Kontakt-61).

How much does the original ISS sensor cost for Murano Z50?

Original sensor 32535-31X00 (until 2012) costs approx. RUB 3,500–5,000, and 32535-31X01 (after 2012) - 4,000–6,000 rub.. Analogues from Hitachi or Denso can be found for 2,000–3,500 rub., but they are not always compatible with the CVT JF011E.

Could P0725 be caused by a faulty engine?

Theoretically yes, but extremely rarely. P0725 connected to the transmission input shaft sensor, and not to the crankshaft sensor (P0335). However, if the engine is running erratically (for example, misfiring), this may indirectly affect the ISS signal. Check the sensor and wiring first.

Do I need to adapt the new ISS sensor after replacement?

No, the ISS sensor is on Nissan Murano Z50 does not require adaptation or training. After replacement, it is enough to reset the error (by disconnecting the battery or using a scanner) and check for the absence of fault codes.