Nissan Almera G15 (2012–2019) is a popular sedan known for its reliability and ease of maintenance. However, even this model has problems with electronics over time, and faulty sensors are often to blame. Their location is not always obvious, especially for novice car owners: some are hidden under the hood, others in the cabin or transmission.

In this article you will find exact layout of all sensors Almera G15, their purpose, signs of breakdown and diagnostic tips. We will analyze both standard elements (mass air flow sensor, lambda probes) and those specific to this model (air conditioning pressure sensor, clutch pedal position sensor). The information is relevant for petrol versions with engines HR16DE (1.6 l) and K4M (1.6 l, for some markets).

General layout of sensors under the hood

Most sensors Nissan Almera G15 concentrated in the engine compartment. They can be divided into three zones:

  • 🔧 Intake manifold and throttle body: sensors for mass air flow (MAF), absolute pressure (MAP), and intake air temperature are located here.
  • 🔥 Cylinder block and cylinder head: sensors for coolant temperature (DTOZH), knock, camshaft position (CMP) and crankshaft position (CKP).
  • ⚡ Exhaust system: lambda probes (oxygen sensors) before and after the catalyst.

Below is an interactive diagram with symbols (clickable on larger versions):

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To accurately identify the sensor, check its article number with the original catalogs Nissan. For example, mass air flow sensor for Almera G15 has a number 22680-4M010 or 22680-4M015 depending on the year of manufacture.

Sensor Location Symptoms of a problem
Mass air flow sensor (MAF) Between the air filter and the throttle valve Floating speed, error P0100, increased fuel consumption
DTOZH In the thermostat housing (left side of the cylinder head) Incorrect temperature readings, error P0115
Lambda probe (bank 1, sensor 1) In the exhaust manifold in front of the catalyst Error P0130, loss of power, black smoke from the exhaust

Important: on Almera G15 with engine HR16DE The throttle position sensor (TPS) is built into the throttle assembly itself and cannot be replaced separately - only as an assembly!

Sensors in the cabin: where to look and how to check

Inside Almera G15 There are fewer sensors located, but their failure can cause just as many problems. The main ones:

  • 🚗 Brake pedal position sensor: attached to the pedal bracket, is responsible for turning on the brake lights and operating the cruise control.
  • 🔄 Clutch pedal position sensor (only for manual transmission): located on the top of the pedal, signals the ECU to press.
  • 🌡️ Interior temperature sensor: Built into the climate control unit (on models with automatic system).

To diagnose cabin sensors, a multimeter is often sufficient. For example, to test the brake pedal sensor:

  1. Remove the connector from the sensor (it is located under the dashboard, next to the pedal).
  2. Set the multimeter to circuit test mode (200 Ohm).
  3. When the pedal is pressed, the resistance between the contacts should be 0 ohm, when released - infinity.
⚠️ Attention: If after replacing the clutch pedal sensor with Almera G15 With a manual transmission, the car started to twitch when starting off, check gap between sensor and pedal arm - he must be 0.5–1 mm. If the gap is smaller, the ECU will falsely register the press.

Lambda probes: location and replacement features

Nissan Almera G15 equipped with two oxygen sensors (lambda probes):

  • 🔥 Upper (Bank 1, Sensor 1): installed in the exhaust manifold before the catalyst. Responsible for adjusting the fuel mixture.
  • 🌿 Lower (bank 1, sensor 2): located after the catalyst, controls its effectiveness.

Replacing lambda probes with Almera G15 has nuances:

Cool the engine (working on a hot manifold is dangerous!)

Disconnect the negative battery terminal

Treat the sensor threads with WD-40 10–15 minutes before unscrewing

Use a special 22mm wrench with a slot for the wire-->

On models with a mileage of more than 100 thousand km, the sensor threads often become stuck. If the probe does not unscrew, do not use excessive force - you risk breaking the threads in the manifold. In this case it will help:

  • 🔧 Heating the collector with a construction hairdryer (up to 200°C).
  • 🔨 Gently tap the sensor through a wooden spacer.
  • 🔩Usage reverse hammer with adapter for lambda probes.
⚠️ Attention: After replacing the lambda probe with Almera G15 may catch fire Check Engine with an error P0133 (“Slow sensor response”). This is normal - the error will reset after 2-3 cycles of warming up the engine to operating temperature.
📊 Which sensor on your Almera G15 failed most often?
  • Mass air flow sensor
  • Lambda probe
  • DTOZH
  • Throttle position sensor
  • Other

ABS sensors and security systems

ABS system on Nissan Almera G15 includes four wheel speed sensors (one for each wheel) and an ABS control unit located under the hood next to the brake master cylinder. Features:

  • 🚲 Front sensors: Built into the wheel bearings, replacement requires removal of the caliper and steering knuckle.
  • 🚗 Rear sensors: attached to the brake mechanism shield, access to them is easier.

Signs of a faulty ABS sensor:

  • 🔴 Burning lamp ABS on the dashboard.
  • 📛 Bugs C1130 (right front sensor), C1135 (left front), etc.
  • 🛑 Increased braking distance during emergency braking.

To diagnose ABS sensors on Almera G15:

  1. Raise the car on a jack and remove the wheel.
  2. Disconnect the sensor connector and check the resistance between the contacts (should be 800–1400 Ohm).
  3. Spin the wheel manually - the voltage on the contacts should vary from 0.3 V to 1.7 V.
How to reset an ABS error without a scanner?

On Almera G15 Some ABS errors are reset automatically after 3–5 ignition on/off cycles. If the lamp remains on:

1. Stop the engine.

2. Turn off the ignition and remove the battery terminal for 10 minutes.

3. Reconnect the terminal and start the car.

If the error returns, diagnostics with a scanner is required (for example, Launch X431 or ELM327).

Climate system sensors

Air conditioning system Nissan Almera G15 includes several sensors that affect the operation of climate control:

Sensor Location Function
Freon pressure sensor On the high pressure pipe (next to the compressor) Shuts off the compressor at critically low/high pressure
Evaporator temperature sensor In the evaporator housing (under the dashboard, passenger side) Prevents evaporator freezing
Solar radiation sensor On the top of the dashboard (near the windshield) Adjusts climate control operation depending on sunlight

If the air conditioner is on Almera G15 turns on but does not cool, first check freon pressure sensor. If it malfunctions, the compressor will turn off 2-3 seconds after starting. The sensor can be diagnosed based on the following criteria:

  • 🔌 The compressor does not turn on at all (even with a sufficient level of freon).
  • 📛 Error B2799 (low pressure in the system).
  • 🌡️ The pressure on the pressure gauge is normal, but the climate control shows an error.

Important: Freon pressure sensor Almera G15 cannot be repaired - only replaced. Its article: 38820-4M000 (original) or 38820-4M005 (analogue from Denso).

Diagnostics of sensors using a scanner

For accurate sensor diagnostics Nissan Almera G15 It is recommended to use a diagnostic scanner that supports the protocol OBD-II. Suitable models:

  • 📱 ELM327 (budget option, works with applications Torque Pro or OBD Auto Doctor).
  • 💻 Launch X431 (professional scanner, reads errors on all systems).
  • 🔧 Autel MaxiCOM (supports sensor adaptations after replacement).

Diagnostic algorithm:

  1. Connect the scanner to the connector OBD-II (located under the steering wheel, to the left of the brake pedal).
  2. Turn on the ignition (no need to start the engine).
  3. From the scanner menu, select Nissan → Almera → 2012–2019 → Engine (or ABS, Transmission, depending on symptoms).
  4. Read errors and view sensor parameters in real time (Live Data).

Examples of error decoding:

  • P0102 — low level of the air flow sensor signal (the sensor may be dirty or faulty).
  • P0300 - random misfires (check the camshaft and crankshaft position sensors).
  • C1145 — malfunction of the wheel speed sensor (ABS) circuit.
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If the scanner shows a sensor error, but its parameters are correct Live Data correspond to the norm - the problem may be in the wiring or connector. Check the circuit for breaks and contact oxidation.

Common mistakes when replacing sensors

Many car owners Nissan Almera G15 encounter problems after replacing sensors themselves. Common mistakes:

  • 🔌 Incorrect connector connection: for example, the contacts on the lambda probe (signal wire and ground) are reversed.
  • 🛠️ Using non-original sensors: cheap analogues may give incorrect readings, especially for mass air flow sensors and ABS sensors.
  • 🔧 Failure to comply with tightening torques: for example, the lambda probe must be tightened firmly 40–50 Nm, otherwise exhaust gas leaks may occur.

To avoid problems:

Use only original spare parts or certified replacements (for example, Bosch, Denso)

Before installation, clean the seat from dirt and old grease.

Apply a high temperature lubricant (such as Loctite 5699)

After replacement, reset the errors using the scanner and perform a test drive-->

Critical error: on Almera G15 After replacing the crankshaft position (CKP) sensor, the engine may not start if the ECU "learning" procedure is not completed. This requires a scanner with the function ECU Relearn (For example, Launch X431).

⚠️ Attention: If after replacing the mass air flow sensor with Almera G15 engine speed will remain stuck at 1500–2000 rpm, check the tightness of the air duct between the mass air flow sensor and the throttle valve. Even a small air leak leads to incorrect operation of the sensor.

FAQ: Frequently asked questions about sensors Nissan Almera G15

Is it possible to drive with a faulty lambda probe?

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

  • Increased fuel consumption by 10–20%.
  • Loss of power (especially at speeds above 3000 rpm).
  • Damage to the catalyst (if the upper sensor is faulty).

On Almera G15 with a mileage of more than 150 thousand km, long driving with a faulty lambda probe can cause an error P0420 (low catalyst efficiency).

How to check the mass air flow sensor without a scanner?

Disconnect the mass air flow sensor connector and start the engine. If the speed has stabilized (about 1500 rpm), the sensor is faulty. You can also measure the voltage between the contacts 5 (signal) And 3 (mass):

  • 0.9–1.0 V - the sensor is OK.
  • 1.03–1.05 V — the sensor resource is running out.
  • 1.06 V and above - The sensor needs to be replaced.
Where is the knock sensor located on Almera G15?

The knock sensor is located on cylinder block, between the 2nd and 3rd cylinders (when viewed from the timing side). It is mounted on one bolt and has a two-pin connector. Signs of malfunction:

  • Error P0325 or P0328.
  • "Knock of fingers" during acceleration (the computer does not adjust the ignition timing).
  • Loss of power at high speeds.
What should I do if, after replacing the ABS sensor, the light on the panel does not go out?

Possible reasons:

  1. Defective ABS control unit (located under the hood, next to the brake master cylinder).
  2. The wiring between the sensor and the unit is damaged (check the circuit with a multimeter).
  3. Errors have not been reset (use a scanner or disconnect the battery for 10 minutes).

On Almera G15 The ABS block often suffers from corrosion of the connectors - clean the contacts with alcohol.

Which scanner is better to buy for diagnostics? Almera G15?

Optimal options in terms of price/quality ratio:

Model Functions Price (approx.)
ELM327 Bluetooth Read/reset errors, Live Data 500–1500 rub.
Launch CReader V+ Diagnostics of all systems, tests of actuators 8000–12000 rub.
Autel MaxiCOM MK808 Professional diagnostics, adaptations, coding 25,000–35,000 rub.

For periodic checking it is sufficient ELM327, for deep diagnostics - Launch or Autel.