Lambda probe for Nissan Murano Z50: diagnostics, errors and DIY replacement

Oxygen sensor (or lambda probe) in Nissan Murano Z50 - a critical element of the engine control system, responsible for correct mixture formation. Its malfunction leads to increased fuel consumption, unstable engine operation and even the risk of damage to the catalyst. Owners Murano Z50 with gasoline engines VQ35DE (3.5 l) and VQ25DE (2.5 l) most often encounter problems with lambda probes after 100–150 thousand kilometers, when the sensors wear out or become contaminated with oil and fuel deposits.

In this article we will look at how self-diagnose lambda probe malfunction Murano Z50, what error codes (P0130, P0135, P0141, etc.) indicate its failure, and how to choose the right replacement - the original sensor from Nissan (article 22690-4M015) or high-quality analogues from Denso, Bosch And NGK. We will also provide step-by-step instructions for replacement, taking into account the design features Murano Z50, where access to the rear sensor is complicated by the location of the exhaust manifold.

Signs of a malfunctioning lambda probe on a Nissan Murano Z50

The first symptoms of a problem with the oxygen sensor on Murano Z50 often disguised as other faults - for example, air leaks or dirty injectors. However, there are a number characteristic features, which directly point to the lambda probe:

• 🔥 Check the engine (Check Engine) lights up intermittently or constantly. Most often accompanied by errors P0130–P0167.
• ⛽ Increased fuel consumption - 1–3 liters per 100 km more than usual. This is due to the fact that the ECU goes into emergency mode and prepares a rich mixture.
• 🚗 Dips during acceleration or rough idle. The sensor transmits incorrect data, and the control unit incorrectly adjusts the fuel supply.
• 💨 Smell of sulfur or gasoline from the exhaust pipe. Indicates incomplete combustion of fuel due to incorrect mixture.

On Murano Z50 with engine VQ35DE a malfunction of the rear lambda probe (after the catalyst) may not manifest itself clearly for a long time, since it only affects the correction of the fuel mixture in a closed circuit. But when the front sensor (before the catalyst) fails, it immediately makes itself known - the car begins to “shake” at idle, and popping noises appear in the exhaust system.

⚠️ Attention: If the dashboard lights up Check Engine and at the same time a metallic ringing sound appeared from under the hood, this may be a sign of destruction of the catalyst due to prolonged work with a faulty lambda probe. In this case, urgent diagnosis is required!

Lambda probe error codes on Murano Z50: decoding

When scanning Nissan Murano Z50 scanner (for example, Launch CReader or ELM327) the most common errors associated with oxygen sensors are:

Error code	Description	Probable Cause	Urgency of elimination
P0130	Incorrect oxygen sensor signal (bank 1, sensor 1)	Sensor wear, open circuit, contamination	⭐⭐⭐⭐⭐
P0135	Sensor Heat Circuit Malfunction (Bank 1, Sensor 1)	Break or short circuit in the heater wires	⭐⭐⭐⭐
P0141	Sensor Heat Circuit Malfunction (Bank 1, Sensor 2)	Problems with the rear sensor or its wiring	⭐⭐⭐
P0161	Incorrect oxygen sensor signal (bank 2, sensor 1)	Present only on all-wheel drive Murano Z50 with VQ35DE	⭐⭐⭐⭐

Errors P0130 And P0135 are the most critical because they relate to front sensor (installed before the catalyst). Its malfunction leads to the fact that the ECU goes into emergency mode, ignoring the sensor readings and using fixed parameters of the fuel mixture. This increases fuel consumption and the risk of catalyst overheating.

Rear sensor errors (P0141, P0161) are less critical to engine performance, but ignoring them may result in the ECU not being able to monitor the effectiveness of the catalyst. In some cases, this leads to a false positive error. P0420 (“Low catalyst efficiency”).

Where is the lambda probe located on the Nissan Murano Z50?

On Nissan Murano Z50 is installed two or four oxygen sensors depending on the configuration and market:

• 🔧 Front sensor (Bank 1 Sensor 1) - located before the catalyst in the exhaust manifold. On VQ35DE The easiest way to find it is by the wires going to the connector on the side member.
• 🔧 Rear sensor (Bank 1 Sensor 2) - installed after the catalyst. Access to it is complicated by the heat shield and suspension elements.
• 🔧 On all-wheel drive versions with VQ35DE a couple more sensors are added for the second row of cylinders (Bank 2 Sensor 1/2).

For the exact location of sensors on your modification Murano Z50 you can use the diagram from the service manual or online spare parts catalogs (for example, Nissan EPC). It is important to note that the sensor locations may differ on US and European models due to different environmental regulations.

How to distinguish the front sensor from the rear?

The front lambda probe is always installed BEFORE the catalyst and has shorter wires (about 30–40 cm). The rear sensor is located AFTER the catalyst, its wires are longer (50–70 cm), since it is connected to the harness running along the bottom.

Advice: Before replacing the sensor, be sure to photograph its connector and wire route. On Murano Z50 The rear sensor wires often rub against the suspension elements, which leads to a short circuit.

How to check the lambda probe on a Murano Z50 with a multimeter?

To diagnose the oxygen sensor on Murano Z50 will be needed digital multimeter (For example, Fluke 17B or Mastech MS8268) and oscilloscope (optional for advanced diagnostics). The check can be divided into two stages:

1. Heater voltage check:
   • 🔋 Disconnect the sensor connector and connect the multimeter probes to the heater contacts (usually white or black wires).
   • 📊 Set resistance measurement mode. A working heater should show 2–10 ohms.
   • 🔌 Check for a short circuit to ground (resistance should approach infinity).
2. Checking the signal wire:
   • 🔌 Connect a multimeter in voltmeter mode (2 V) between the signal wire (usually black) and ground.
   • 🚗 Start the engine and warm it up to operating temperature. The voltage should fluctuate within the range 0.1–0.9 V.
   • 📉 If the voltage is stable 0.45 V or does not change - the sensor is faulty.

For more accurate diagnosis, you can use oscilloscope, which will show the waveform. A working sensor should output sine wave with a frequency of 1–2 Hz when operating at idle speed. If the signal “sticks” at the same level or has sudden jumps, the sensor must be replaced.

⚠️ Attention: On Murano Z50 with the system Nissan Direct Ignition System (NDIS) When checking the lambda probe, be sure to turn off the ignition before connecting the multimeter! Applying voltage to the signal wire may damage the engine control unit.

Choosing a lambda probe for Nissan Murano Z50: original vs analogues

When replacing the oxygen sensor with Murano Z50 owners are faced with a choice: to buy original sensor from Nissan or a high-quality analogue. Original spare parts guarantee compatibility, but their price can reach 15–20 thousand rubles. Analogs from trusted brands (for example, Denso or Bosch) will cost 2–3 times less, without being inferior in reliability.

Manufacturer	Article	Sensor type	Price, rub.	Notes
Nissan (original)	22690-4M015	Front (Bank 1 Sensor 1)	12 000–18 000	Suitable for VQ35DE And VQ25DE
Denso	DOX-0108	Front/rear	4 500–6 000	The best analogue, used on the conveyor
Bosch	0 258 006 537	Universal (requires soldering)	3 000–4 500	You need to resolder the connector under Nissan
NGK	NTK 24351	Front	5 000–7 000	Highly reliable, but rarely available

Critical: On Murano Z50 with engine VQ35DE front and rear sensors not interchangeable! They have different wire lengths and housing designs. Installing a rear sensor instead of a front one will result in an error. P0130 and unstable engine operation.

When choosing an analogue, pay attention to:

• 🔌 Connector type - must match the original (on Murano Z50 a 4-pin connector with a locking mechanism is used).
• 📏 Wire length — the short wire of the rear sensor will not reach the connector.
• 🔥 Housing material — cheap sensors with an aluminum body quickly corrode.

Step-by-step instructions for replacing the lambda probe on a Murano Z50

Replacing the front lambda probe with Nissan Murano Z50 relatively simple and takes 30–60 minutes. The rear sensor will take longer to tinker with due to limited access. To work you will need:

• 🔧 Special key for lambda probe (22 mm with slot).
• 🔨 Penetrating lubricant (e.g. WD-40 Specialist).
• 🔥 Gas burner or hair dryer (for heating the stuck thread).
• 🛠️ Jack and stops (if bottom access is required).

To replace the front sensor:

1. 🚗 Turn off the engine and let it cool (working on a hot engine is dangerous!).
2. 🔌 Disconnect the sensor connector by pressing the latch.
3. 🔧 Treat the thread generously with penetrating lubricant and wait 10-15 minutes.
4. 🔥 Heat the sensor body with a gas burner (do not overheat!) and carefully unscrew it counterclockwise.
5. 🔧 Install a new sensor, having previously lubricated the thread with graphite lubricant. Tighten firmly 40–50 Nm.
6. 🔌 Connect the connector and check for errors with the scanner.

For replacement rear sensor Additionally you will need:

• 🚗 Raise the car on a lift or drive it into a pit.
• 🔧 Remove the heat shield (attached with 3 bolts).
• 🔨 You may have to disconnect part of the exhaust system to gain access.

⚠️ Attention: On Murano Z50 With a mileage of more than 150 thousand km, the threads of lambda probes often stick. Do not apply excessive force - this may strip the threads in the manifold! As a last resort, use remover for broken bolts.

Common replacement mistakes and how to avoid them

Even experienced car owners make mistakes when replacing a lambda probe with Murano Z50, which then turn into new problems. Here are the most common ones:

• 🔧 Using a universal sensor without adapting the connector. This results in an unstable signal and an error P0134 (“No sensor activity”).
• 🔥 Overheating of the sensor housing when unscrewing. Excessive heat from the torch can damage the ceramic element of the new sensor before installation.
• 🛠️ Failure to comply with the tightening torque. Weak tightening leads to air leaks, and excessive tightening leads to thread failure.
• 🔌 Damage to the wiring when disconnecting the connector. On Murano Z50 wires are often brittle due to high temperatures.

To avoid problems:

• 📋 Always check with electrical circuit your modification (on Murano Z50 Connectors may differ for different markets!).
• 🔧 Use torque wrench for tightening (the torque is indicated in the service manual).
• 🔌 Before installing a new sensor, check integrity of its o-ring.

If after replacing the sensor the error P0130 left, check:

• 🔌 The connector is connected correctly (sometimes the contacts oxidize).
• 🔋 Availability of power to the heater (must be 12 V with the ignition on).
• 🛠️ Exhaust system tightness (air leaks through cracks or gaskets).

FAQ: Frequently asked questions about the lambda probe on the Murano Z50

Is it possible to drive with a faulty lambda probe?

In the short term - yes, but this will lead to:

• ⛽ Increased fuel consumption (up to +20%).
• 🚗 Unstable engine operation (especially at idle).
• 💨 Risk of overheating and destruction of the catalyst (replacement will cost 50-100 thousand rubles).

Driving for a long time with a faulty sensor is not recommended!

How long does a lambda probe last on a Murano Z50?

Service life depends on operating conditions:

• 🚗 Original sensor: 100–150 thousand km.
• 🔧 High-quality analogue (Denso, Bosch): 80–120 thousand km.
• ⚠️ Cheap analogues: 30–50 thousand km (often fail due to low-quality ceramics).

The resource is affected by: fuel quality, serviceability of the ignition system and the presence of oil deposits in the exhaust system.

Is it possible to clean the lambda probe instead of replacing it?

Theoretically yes, but the effectiveness depends on the degree of contamination:

• 🧹 Light deposits: You can try cleaning with phosphoric acid (soak for 10–15 minutes, then rinse).
• 🚫 Heavy deposits or melting: Cleaning will not help - only replacement.

On Murano Z50 cleaning the sensor gives a temporary effect (for 10–20 thousand km), after which the problem returns.

Why does the error not go away after replacing the sensor?

Possible reasons:

• 🔌 Circuit fault: Check the wires for breaks or short circuits (especially near the exhaust manifold).
• 🔥 Air leak: Inspect the manifold gaskets and exhaust system corrugation.
• 🛠️ Defective new sensor: Rare, but does occur (check the voltage on the signal wire).
• 📋 Errors not cleared: Some scanners do not clear stuck errors - try disconnecting the battery for 10 minutes.

Which lambda probe is better to choose for the Murano Z50 - original or analogue?

Depends on budget and goals:

• 💰 Original (Nissan): Optimal if you plan to drive the car for a long time. Guaranteed to last 100+ thousand km.
• 🔧 Denso or NGK: The best analogues in terms of price/quality ratio. Suitable for most occasions.
• ⚠️ Bosch universal: Cheaper, but requires soldering of the connector and may last less.

On Murano Z50 with a mileage of over 200 thousand km, it makes sense to install the original - cheap analogues quickly fail due to engine wear.