Lambda probe for Nissan Almera G15: how to check, select and replace

Oxygen sensor (lambda probe) in Nissan Almera G15 - a key element of the engine control system, responsible for the correct composition of the air-fuel mixture. Its malfunction leads to increased fuel consumption, unstable engine operation and even the risk of damage to the catalyst. Owners Almera G15 (2012–2019) often encounter problems with lambda probes due to poor fuel quality, wiring wear, or manufacturing defects.

In this article we will analyze all aspects of the operation of lambda probes on Almera G15: from the operating principle to step-by-step replacement instructions. You will learn how to recognize a malfunction by symptoms and error codes, what sensors are installed on different modifications (1.5 and 1.6 l), and how to save on replacement without sacrificing reliability. We will pay special attention a unique feature of the Almera G15 is the location of the second sensor after the catalyst, which is often ignored during diagnostics.

How does a lambda probe work on a Nissan Almera G15?

Lambda probe (or oxygen sensor) measures the oxygen content in the exhaust gases and transmits the data to ECU (electronic control unit). Based on them, the computer adjusts the ratio of fuel and air in the mixture, striving for the ideal ratio λ=1 (14.7 parts air to 1 part fuel). On Almera G15 Two types of sensors are installed:

• 🔹 Manager (top) - located before the catalyst. Responsible for real-time mixture correction.
• 🔹 Diagnostic (lower) - worth it after the catalyst. Monitors the efficiency of the catalytic converter.

On engines HR15DE (1.5 l) and HR16DE (1.6 l) are used broadband sensors (type Air-Fuel Ratio Sensor), which are more accurate than traditional zirconium ones. They are able to measure not only the lean/rich mixture, but also the exact value λ in the range 0.7–1.3. This is critical to environmental compliance Euro 5, for which it is certified Almera G15.

Sensors operate at temperatures 300–900°C, therefore their design provides heating element. Cold ECU uses averaged data until the probe warms up. B Almera G15 the heater turns on immediately after startup, which speeds up the transition to operating mode.

Signs of a malfunctioning lambda probe

A faulty oxygen sensor appears both while driving and in stationary mode. The main danger is over-enriched mixturewhich leads to:

• 🔥 Catalyst overheating (risk of cell melting).
• 💰 Increased fuel consumption (up to +2–3 l/100 km).
• ⚡ Misfire due to flooding of candles.

Typical symptoms on Nissan Almera G15:

Symptom	Probable Cause	Additional signs
Floating idle speed	Defective control sensor (before catalyst)	The revolutions fluctuate in the range 600–1200 rpm, the engine stalls
Jerks during acceleration	Slow sensor response to load changes	Appears when 2000–3000 rpm, especially on a cold engine
Lights up Check Engine	Errors P0130–P0167 (see section below)	May be accompanied by loss of power
Deterioration in dynamics	False data from the sensor → ECU over-enriches the mixture	Dullness when overtaking, delayed response to the gas pedal

Feature Almera G15: upon failure diagnostic sensor (after the catalyst) there may be no symptoms, but the dashboard will light up Check Engine with an error P0420 (“Low catalyst efficiency”). Many owners mistakenly change the catalyst without checking the sensor.

OBD2 Error Codes Related to Lambda Sensor

On Nissan Almera G15 Malfunctions of oxygen sensors are manifested by the following codes:

• 🔧 P0130 — Incorrect oxygen sensor signal (bank 1, sensor 1).
• 🔧 P0131 — Low signal level (lean mixture).
• 🔧 P0132 — High signal level (rich mixture).
• 🔧 P0133 — Slow sensor response.
• 🔧 P0134 - No signal.
• 🔧 P0135 — Sensor heater malfunction.
• 🔧 P0420 — Low catalyst efficiency (often to blame second sensor).

Errors P0130–P0135 refer to control sensor, and P0150–P0155 - to diagnostic. On Almera G15 with engine HR16DE codes can be duplicated for both banks (if the system recognizes them as separate), although the engine here is in-line.

⚠️ Attention: Error P0420 in 80% of cases it is not related to the catalyst, but to a faulty one second lambda probe. Before replacing the catalyst (cost from 30 thousand rubles), be sure to check the sensor with a multimeter or oscilloscope.

Use scanners for diagnostics ELM327 (For example, ScanTool OBDLink LX) or professional type devices Launch X431. On the menu Live Data please note:

• 📊 Response time sensor (must be <100ms).
• 📊 Voltage at idle speed (should fluctuate in the range 0.1–0.9 V).
• 📊 Temperature sensor (must reach 600°C 2–3 minutes after startup).

How to check the lambda probe on a Nissan Almera G15

Sensor diagnostics include visual inspection, multimeter testing, and signal analysis with an oscilloscope. For work you will need:

• 🔧 Multimeter (with millivoltmeter mode).
• 🔧 Oscilloscope (optional, for accurate diagnostics).
• 🔧 Set of socket wrenches (for 22 mm for the sensor).

Step 1. Visual inspection

Remove the sensor (unplug the connector and unscrew it with a key 22 mm). Signs of malfunction:

• 🔥 Soot on the working part - rich mixture or oil leakage into the combustion chamber.
• 🟤 White coating — use of additives or antifreeze in fuel.
• 🟠 Shiny deposits — lead in gasoline (destroys the sensitive element).

Step 2. Check with a multimeter

Connect the probes to the heater contacts (usually white wires) and measure the resistance:

• 🔋 Norm: 2–10 ohms (with 20°C).
• 🔋 Break: ∞ (infinity).
• 🔋 Short circuit: <1 Ohm.

Then check the voltage of the signal wire (usually black) relative to ground (sensor housing) with the engine running:

• 📉 Normal: fluctuations 0.1–0.9 V (1 time per second at idle).
• 📛 Fault: stable 0.45 V or no change.

Step 3. Check with an oscilloscope (optional)

Connect the oscilloscope to the signal lead and start the engine. Normal schedule:

• 📈 Sine wave with amplitude 0.1–0.9 V and frequency 1–2 Hz.
• 📉 Straight line at the level 0.45 V — the sensor is not working.

⚠️ Attention: On Almera G15 with mileage over 150 thousand km is often found air leak through cracks in the exhaust pipe in front of the sensor. This simulates a malfunction of the lambda probe, but the problem lies in mechanical damage. Check the tightness of the system with a smoke generator or soap solution.

Choosing a lambda probe for Nissan Almera G15: original vs analogues

On Nissan Almera G15 production sensors are installed NTK (division NGK) or Denso. Original part numbers depend on the year of manufacture and engine type:

Engine	Sensor position	Original article	Analogs (recommended)
HR15DE (1.5 L, 2012–2015)	Manager (before catalyst)	22690-4M010	NTK 25077, Denso DOX-0108, Bosch 0 258 006 537
HR15DE (1.5 L, 2016–2019)	Manager	22690-4M015	NTK 25097, Denso DOX-0114
HR16DE (1.6 l, all years)	Manager	22690-4M011	NTK 25087, Bosch 0 258 006 668
All engines	Diagnostic (after catalyst)	22690-AL60A	NTK 25137, Denso DOX-0209

When choosing an analogue, pay attention to:

• 🔌 Connector type - on Almera G15 4-pin sensors are used (2 wires for the heater, 1 signal, 1 ground).
• 📏 Wire length - the original has a length 450 mm, for some analogues it may differ.
• 🔥 Sensor type - must be broadband (for HR16DE definitely!).

Average prices (for 2026):

• 💰 Original (NTK/Nissan): 5,000–8,000 rub.
• 💰 High-quality analogue (Denso, Bosch): RUB 3,500–5,000
• 💰 Budget analogue (Febi, Vemo): 1,500–2,500 rub. (risk of defects ~30%).

Where to buy:

• 🛒 Official dealers Nissan — 1 year warranty, but high price.
• 🛒 Exist.ru, Autodoc — a wide selection of analogues with reviews.
• 🛒 Local stores (for example, "Avtodetal") - you can check the sensor before purchasing.

How to distinguish a fake lambda probe?

Fakes often have:

- Uneven seams on the body.

- Fuzzy markings (blurry symbols).

- Plastic, not metal connector.

- No hologram on the packaging (for NTK/Denso).

The original sensors are packaged in sealed blisters with silica gel.

Step-by-step instructions for replacing the lambda probe

Replacing the sensor with Nissan Almera G15 does not require special skills, but there are some nuances:

• 🔧 Control sensor (before the catalyst) is easier to change - good access from above.
• 🔧 Diagnostic sensor (after the catalyst) may require removal of protection or jacking.

Tools:

• 🔨 Socket wrench on 22 mm (special for sensors, with slot for wire).
• 🔨 Extension cord and ratchet.
• 🔨 Penetrating lubricant (WD-40 or Liqui Moly LM-40).
• 🔨 Dielectric grease for the connector.

Work order:

1. 🚗 Cool the engine (working on hot exhaust is dangerous!).
2. ⚡ Disconnect the negative battery terminal (to avoid short circuit).
3. 🔌 Disconnect the sensor connector (press the lock and pull up).
4. 🔧 Treat threads with penetrating lubricant and wait 10–15 minutes.
5. 🔧 Unscrew the sensor counterclockwise. If it doesn’t work, use an extension for the lever.
6. 🔧 Install a new sensor, having previously lubricated the threads with graphite lubricant (without getting it on the working part!).
7. 🔌 Connect the connector and fix it on the standard mount.
8. 🚗 Start the engine and check for errors with the scanner.

⚠️ Attention: On Almera G15 with engine HR16DE when replacing control sensor It may be necessary to reset the fuel system adaptations via the scanner (function Fuel Trim Reset). Without this, the engine will operate unstably for the first 50–100 km.

Common mistakes when replacing:

• 🚫 Sensor re-stretching — leads to damage to the threads in the manifold (tightening torque: 40–50 Nm).
• 🚫 Using sealant - prohibited! The sealant will get on the sensitive element and damage the sensor.
• 🚫 Wire damage — lay the harness so that it does not touch the hot parts of the exhaust.

Frequently asked questions about lambda probes on Almera G15

Is it possible to drive with a faulty lambda probe?

Short term - yes, but this leads to:

• 🔥 Increased fuel consumption (+15–20%).
• 💥 Risk of overheating and destruction of the catalyst (repair from 20 thousand rubles).
• ⚡ Misfires and vibrations.

On Almera G15 with a faulty sensor ECU goes into emergency mode, fixing the speed at the level 1,500–2,000 rpm and limiting power.

Which lambda probe fails more often: upper or lower?

On Almera G15 control sensor (before the catalyst) breaks down 3 times more often than the diagnostic one. Reasons:

• 🔥 Higher temperature (up to 900°C against 700°C at the bottom).
• 💨 Direct contact with combustion products (soot, oil, additives).

The diagnostic sensor usually fails due to mechanical damage (for example, when driving off-road) or corrosion of the wiring.

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

Cleaning is only possible with carbon deposits (soot). Use:

1. 🧹 Orthophosphoric acid (soak for 20 minutes, then rinse with water).
2. 🧹 Ultrasonic bath (in car services).

❌ Does not help with:

• Oxidation of the sensitive element.
• Heater breakage.
• Melting of the body.

On Almera G15 cleaning gives a temporary effect (3–6 months), after which the sensor still requires replacement.

How many oxygen sensors are there on Nissan Almera G15?

On all modifications Almera G15 (2012–2019) to be established 2 lambda probes:

• 🔹 Manager — in the exhaust manifold (before the catalyst).
• 🔹 Diagnostic — after the catalyst (in the resonator).

On engines HR16DE (1.6 l) both sensors - broadband, on HR15DE (1.5 l) - manager only.

What errors appear when the heater circuit is broken?

If the lambda probe heater breaks or short circuits to Almera G15 errors occur:

• 🔧 P0135 - heater circuit, bank 1, sensor 1.
• 🔧 P0141 - heater circuit, bank 1, sensor 2.

The sensor will work, but only after the exhaust system has completely warmed up (after 10–15 minutes of driving), which will lead to:

• ❄️ Bad cold start.
• ⛽ Increased fuel consumption in the first minutes of the trip.