Error P0720 on Nissan: why does it appear and how to fix it?

Fault code P0720 on cars Nissan - one of the most common problems associated with transmission operation. This error indicates a problem in the circuit output shaft speed sensor (Output Shaft Speed Sensor, OSS), which is responsible for the correct transmission of data on the shaft rotation speed to the automatic transmission control unit. Without accurate readings from this sensor, the electronics cannot select gears correctly, which leads to jerks, shift delays, or even emergency operation of the box.

Owners Nissan Qashqai, X-Trail, Teana and other models with automatic transmission RE0F10A or JF015E encounter this error most often. Moreover, the problem can manifest itself both when the engine is cold and after the engine warms up. In this article we will look at all possible reasons appearance P0720, diagnostic and repair methods - from simple cleaning of contacts to replacing the sensor or even the control unit.

What does the P0720 code mean on Nissan?

Code P0720 stands for "Output Speed Sensor Circuit Malfunction" - Malfunction of the output shaft speed sensor circuit. This sensor is located on the automatic transmission housing and reads the output shaft speed, transmitting data to TCM (Transmission Control Module - transmission control unit). If the signal is missing, distorted or interrupted, the ECU records the error and can:

• 🔴 Convert the box to emergency mode (limited to 3rd gear).
• 🔴 Light up on the dashboard Check Engine and icon AT (Automatic Transmission).
• 🔴 Cause jerking, slipping or delays when changing gears.

On some models Nissan (For example, Murano Z51 or Pathfinder R51) error P0720 may be accompanied by additional codes such as P0715 (input shaft sensor malfunction) or P0730 (wrong gear ratio). This complicates diagnostics, since problems can be associated with the sensor itself, as well as with the wiring or control unit.

It is important to understand that P0720 is not a death sentence. In 60% of cases, the problem is solved without major repairs, but it cannot be ignored: long-term driving with a faulty speed sensor can lead to friction wear and expensive automatic transmission repairs.

The main causes of the P0720 error code

Reasons for the appearance of the code P0720 on Nissan several, and they are divided into mechanical (related to the sensor or box) and electric (problems with wiring or control unit). Let's look at them in more detail:

Fault type	Possible reason	How it manifests itself
Mechanical	Worn or damaged OSS sensor	The error appears constantly, the box goes into emergency mode
Mechanical	Sensor contamination with metal shavings	Intermittent crashes, error disappears after cleaning
Electric	Open or short circuit in wiring	The error appears during vibration or after washing
Electric	Oxidation of contacts on the sensor or TCM connector	Problems after rain or high humidity
Software	TCM control unit firmware failure	The error appears after updating the software or disconnecting the battery

The most common reason is failure of the sensor itself. Over time, its magnetic element loses sensitivity, and the plastic case cracks due to temperature changes. The sensor can also become clogged with metal shavings, which are formed when bearings or clutches in an automatic transmission wear out.

Another common problem is wiring damage. The wires from the OSS sensor run close to the manifold outlet and often become melted or chafed. This is especially true for Nissan Qashqai J10 And X-Trail T31, where the harness was laid unsuccessfully.

Symptoms of a faulty speed sensor on a Nissan

Error P0720 rarely appears on its own - it is usually preceded by noticeable changes in the behavior of the car. Here are the key signs that should alert you:

• ⚠️ Jerks when shifting gears (especially from 1st to 2nd or from 3rd to 4th).
• ⚠️ Acceleration delays — the box “thinks” for a few seconds before switching.
• ⚠️ Unstable idle when the gear is engaged (the car may jerk in place).
• ⚠️ Speedometer is not working correctly or the arrow jumps.
• ⚠️ The box goes into emergency mode (lit AT on the panel, only 3rd gear is engaged).

On some models (for example, Nissan Almera N16 or Primera P12) error P0720 can only appear when certain conditions:

• 🌡️ In the cold (after overnight parking).
• 💦 After washing or driving through puddles.
• 🚗 When driving at speeds above 80–100 km/h.

If you notice any of these symptoms, do not delay diagnosis. Driving for a long time with a faulty speed sensor can lead to:

⚠️ Attention: Wear of the friction discs due to incorrect commands from the control unit, which will require automatic transmission overhaul costing from 80,000 rubles.

How to diagnose the P0720 code yourself

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

• 🔧 OBD-II scanner (For example, ELM327 or Launch CReader).
• 🔧 Multimeter (to check the sensor resistance).
• 🔧 Screwdriver and flashlight (for inspection of connectors).

Step 1. Read errors by the scanner

Connect the scanner to the connector OBD-II (located under the steering wheel) and check for codes. If in addition P0720 There is P0715 (input shaft sensor) or U1000 (loss of communication with the control unit), the problem may be TCM or wiring.

Step 2: Test the OSS sensor with a multimeter

Output shaft speed sensor on most Nissan has two-pin connector. To check it:

1. Remove the connector from the sensor (it is located on the automatic transmission housing on the right drive shaft side).
2. Set the multimeter to resistance measurement mode (200 ohms).
3. Connect the probes to the sensor contacts. Normal resistance - from 80 to 200 Ohm.
4. If resistance 0 ohm (short circuit) or ∞ (break), the sensor is faulty.

Step 3. Inspect the wiring and connectors

Oxidation or damage to contacts is a common cause. P0720. Please note:

• 🔌 OSS sensor connector — there should be no green deposits or rust.
• 🔌 Wiring harness from the sensor to the control unit (often rubs against the body).
• 🔌 TCM connector (usually located under the center console).

If after resetting the errors by the scanner P0720 appears again, the problem is definitely in the sensor, wiring or control unit. In this case, a more in-depth diagnosis will be required using oscilloscope or contacting service.

How to Troubleshoot P0720: Step-by-Step Instructions

The repair method depends on the cause of the problem. Let's consider all possible scenarios - from the simplest to the most complex.

1. Cleaning or replacing the OSS sensor

If the sensor is contaminated with metal shavings or its resistance is not up to standard, it must be clean or replace.

Replacement instructions:

1. Raise the vehicle on a lift or ramp.
2. Remove the crankcase protection (if equipped).
3. Find the OSS sensor on the automatic transmission housing (usually it is screwed into the box and has a two-pin connector).
4. Disconnect the connector and unscrew the sensor with a key 10 mm.
5. Install a new sensor (part number for Nissan Qashqai J11 — 31397-3MX0A, for X-Trail T32 — 31397-AL50A).
6. Connect the connector and reset the errors using the scanner.

If the sensor is simply dirty, it can be cleaned gasoline or WD-40, but this is a temporary solution - over time the problem will return.

2. Wiring repair

If damage to the wires is revealed during inspection, they must be restore or replace.

What to do:

• 🔧 Clean and insulate damaged areas (use heat shrink tube).
• 🔧 If the harness melts, replace it completely (with Nissan ready-made repair kits are often sold).
• 🔧 Check the “mass” of the sensor - it should be securely attached to the body.

On Nissan Teana J32 And Murano Z51 The wiring near the TCM connector often gets frayed. In this case it is recommended resolder contacts or replace the entire connector.

3. Checking and replacing the TCM control unit

If the sensor and wiring are ok, but there is an error P0720 does not go away, the problem may be transmission control unit.

Symptoms of a TCM malfunction:

• 🚨 The error appears even after replacing the sensor.
• 🚨 The box is unstable, despite working sensors.
• 🚨 There are signs of oxidation or burning on the TCM connector.

In this case, you can try:

1. Reset the box adaptations (you need a scanner with the function TCM Reset).
2. Reflash the block (relevant for Nissan Juke F15 And Note E12).
3. Replace the TCM with a new or used one (part number for Qashqai J10 — 28521-4M000).

⚠️ Attention: After replacing the TCM you will need register the block in the immobilizer (on some models) and execute automatic transmission initialization. Without this, the box will not work correctly.

4. Checking the mechanical part of the automatic transmission

If all electrical components are OK, but error P0720 remains, the problem may lie in box mechanics:

• 🔧 Wear of the output shaft bearing (leads to beating and malfunction of the sensor).
• 🔧 Damage to the gear from which the sensor reads the signal.
• 🔧 Automatic transmission oil contamination with metal shavings (check the level and condition of the fluid).

In this case you will need disassembling the box and replacement of worn parts. It is not recommended to carry out such repairs yourself - it is better to contact a specialized service.

How much does it cost to repair a P0720 code?

The cost of troubleshooting depends on the cause and model of the car. Here are the approximate prices for popular Nissan:

Type of repair	Cost (RUB)	Notes
Replacing the OSS sensor	1 500 – 4 000	The price of the sensor is from 1,000 to 3,000 rubles, labor is 500–1,000 rubles.
Wiring repair	1 000 – 3 000	Depends on the degree of damage (soldering, replacement of the harness).
Cleaning TCM connectors	500 – 1 500	Includes removing the center console.
Replacing the TCM	15 000 – 40 000	New unit - from 20,000 rubles, used - from 8,000 rubles. + programming.
Automatic transmission repair (bearing/gear replacement)	30 000 – 100 000	Includes disassembling the box and replacing worn parts.

On Nissan Qashqai J11 And X-Trail T32 with automatic transmission JF015E Most often, replacing the sensor or cleaning the contacts helps. On older models (eg. Primera P12 or Almera N16) repair of the wiring or control unit is often required.

If you decide to repair the car yourself, consider:

• 💰 OSS sensor for most models it is inexpensive (1,000–3,000 rubles), but the original is more reliable than its analogues.
• ⚡ TCM unit It’s better to buy a new one - a used one may have hidden defects.
• 🔧 Automatic transmission disassembly Trust only proven craftsmen - errors during assembly will lead to even more serious damage.

Preventing error P0720 on Nissan

To avoid problems with the speed sensor and control unit, follow these recommendations:

• 🔄 Regularly check the level and condition of the oil in the automatic transmission (every 30,000–50,000 km). Use only original fluid Nissan Matic-S or Matic-J.
• 🚿 Avoid driving through deep puddles — moisture can get into the sensor connectors.
• 🔌 Clean your contacts periodically OSS and TCM sensor from oxidation (every 1–2 years).
• 🛠️ At the first sign of trouble (jerks, switching delays) immediately carry out diagnostics.

For vehicles with mileage over 150,000 km, it is recommended replace the OSS sensor prophylactically, even if the error P0720 hasn't appeared yet. Its resource is limited, and over time the signal becomes less stable.

Also note fuel quality. On Nissan with engines MR20DD or QR25DE bad gasoline can lead to detonation, which negatively affects the operation of electronics, including automatic transmission sensors.

Frequently asked questions (FAQ)

Is it possible to drive with P0720?

Short term - yes, but not recommended. Long-term driving with a faulty speed sensor leads to wear of the clutches and can damage the control unit. If the box goes into emergency mode, drive only to the nearest service center.

Why does P0720 only appear when it is cold?

This is a typical sign contact oxidation or sensor wear. At low temperatures, the resistance in the circuit increases and the signal disappears. After warming up, the contacts can “break through” and the error disappears. The solution is to clean the connectors or replace the sensor.

How to reset P0720 without a scan tool?

You can disconnect the negative terminal of the battery for 10–15 minutes. However this will reset all errors, and if the problem persists, P0720 will appear again. For an accurate reset you need a scanner with an error clearing function TCM.

What other sensors can affect error P0720?

The operation of the box is also affected by:

• 🔹 Input shaft sensor (P0715).
• 🔹 Selector lever position sensor (P0705).
• 🔹 Automatic transmission oil temperature sensor (P0710).

If together with P0720 There are other codes, diagnose them together.

Can error P0720 appear after changing the automatic transmission oil?

Yes, if:

• 🔹 It was flooded low quality oil or inappropriate type (for example, instead of Matic-S used Dexron-III).
• 🔹 When changing oil the sensor was damaged or its connector.
• 🔹 After replacement was not performed reset adaptations boxes.

In this case, you need to recheck the oil level and diagnose the sensors.