How to replace the crankshaft position sensor on a Nissan Almera Classic: step-by-step guide with photos

Crankshaft position sensor (CPS) on Nissan Almera Classic - A critical element of the engine management system. Its malfunction leads to malfunctions of the engine: from unstable idling to complete failure to start. Despite its simple design, this sensor often causes headaches for owners, especially on cars with a mileage of 150,000 km.

In this article we will look at all stages of replacing DPKV on Almera Classic (models B10 And N16 with engines GA16DE, QG15DE, QG18DE), including fault diagnosis, selection of original or analog spare parts, as well as unique dismantling nuances that are not written about in standard manuals. We will pay special attention to typical mistakes that even experienced car owners make when working with this sensor.

Signs of a faulty crankshaft sensor on a Nissan Almera Classic

The crankshaft sensor has no mechanical wear, but it can be damaged by external factors: overheating, corrosion of contacts, damage to wiring or magnetic core. You can recognize the problem by the following symptoms:

• 🔴 Engine won't start or stalls immediately after starting (there may be a light on the dashboard Check Engine).
• 📉 Floating speed at idle (from 500 to 1500 rpm) for no apparent reason.
• ⚡ Misfires under load (during acceleration or driving uphill).
• 🚗 Jerks and jerks when driving at low speeds (especially noticeable at Almera Classic with automatic transmission).
• 🔧 Bugs P0335 or P0336 during diagnostics (unstable DPKV signal).

It is important to distinguish the symptoms of a faulty DPKV from problems with camshaft sensor or ignition coils. For example, if the engine stalls only when hot, it may not be the crankshaft that is to blame, but coolant temperature sensor. For accurate diagnosis you will need a scanner ELM327 or multimeter.

⚠️ Attention: On Nissan Almera Classic with engine QG18DE a faulty DPKV can manifest itself as immobilizer false alarm. If the car does not start and the key is flashing on the dash, check the sensor first!

Crankshaft sensor diagnostics: how to confirm the malfunction

Before changing the DPKV, make sure that this is the problem. Here 3 reliable verification methods:

1. Visual inspection. Check the integrity of the sensor body and the absence of cracks and corrosion on the contacts. Pay special attention magnetic core - if it is covered with metal shavings, the sensor needs to be replaced.
2. Check with a multimeter. Measure the resistance between the DPKV terminals (standard for Almera Classic: 550–750 Ohm). If the resistance is lower 500 Ohm or tends to infinity - the sensor is faulty.
3. Diagnostics with an oscilloscope. Connect to the signal wire of the sensor and check the shape of the pulses when cranking the starter. On a faulty DPKV the signal will be unstable or absent altogether.

If you don't have an oscilloscope, you can get by "for replacement" check: temporarily install a known working sensor (for example, from disassembly) and observe the behavior of the engine. This method works 90% of the time.

Diagnostic method	Required equipment	Accuracy, %	Check time
Visual inspection	Flashlight, magnifying glass	30–40%	5–10 minutes
Checking with a multimeter	Multimeter (ohmmeter mode)	60–70%	10–15 minutes
Diagnostics with an oscilloscope	Oscilloscope, adapter wires	95–100%	20–30 minutes
Check "for replacement"	Known working sensor	90%	15–20 minutes

Choosing a crankshaft sensor for Nissan Almera Classic: original vs analogues

Original crankshaft sensor for Almera Classic has an article number 23731-4M500 (for engines GA16DE/QG15DE) or 23731-4M505 (for QG18DE). Its average price is 2500–3500 rubles. However, there are worthy analogues on the market that will cost less:

• 🔹 Beru (article BES0036) - German quality, price ~1800 rub.
• 🔹 Bosch (article 0 261 210 115) - reliable option, ~2200 rub.
• 🔹 Denso (article 550-0103) - Japanese equivalent, ~2000 rub.
• 🔹 Febi (article 23731) - budget option, ~1200 rub.

When choosing an analogue, pay attention to wire length And connection connector. On Almera Classic after 2005, the sensor may have a different plug (for example, 2-pin instead of 3-pin). Also check contact polarity - on some Chinese analogues it may be confused.

⚠️ Attention: When purchasing a disassembled sensor, be sure to check its resistance! Even an externally serviceable DPKV may have internal breaks that will appear only after installation.

Tools and materials for replacing the crankshaft sensor

To replace DPKV with Nissan Almera Classic you will need:

• 🔧 Head on 10 mm or a socket wrench (for unscrewing the fastening bolt).
• 🔧 Extension and ratchet handle (for ease of access).
• 🔧 Screwdriver with a flat blade (for prying off the connector lock).
• 🧴 WD-40 or similar penetrating lubricant (if the bolt is stuck).
• 🧤 Gloves (protection from dirt and sharp edges).
• 📦 New crankshaft sensor (check the contents before installation!).

Also prepare rags — the space around the sensor is usually contaminated with oil and dust. If you plan to clean the seat, take carbcleaner or aerosol gasoline.

Disconnected the battery (negative terminal)|

Cleaned the area around the sensor from dirt |

Checked the new sensor for resistance |

Prepared the tool and WD-40 lubricant |

I photographed the location of the connector (for correct connection) -->

Step-by-step instructions for replacing the crankshaft sensor

The process of replacing DPKV with Nissan Almera Classic takes 20–40 minutes depending on the condition of the fastening bolt. Follow the instructions:

1. Turn off the power. Remove the negative terminal from the battery to avoid short circuit.
2. Find the sensor. On GA16DE/QG15DE it is located on oil pan near the crankshaft pulley. On QG18DE - on timing cover (see photo below).
3. Disconnect the connector. Press the latch and carefully pull out the plug. If the contacts are oxidized, clean them alcohol or WD-40.
4. Unscrew the fastening bolt. Use the head on 10 mm with extension cord. If the bolt does not budge, apply WD-40 and wait 5-10 minutes.
5. Remove the sensor. Gently pull it towards you. If it “sticks”, do not use force - it is better to treat the seat penetrating lubricant.
6. Clean the seat. Remove dirt and metal shavings (their presence indicates wear crankshaft bushings).
7. Install a new sensor. Insert it all the way, then tighten the bolt to torque. 8–10 Nm (do not overtighten!).
8. Connect the connector. Make sure that the latch clicks into place - this will prevent spontaneous detachment.

A critically important point: Almera Classic with an automatic transmission, when replacing the DPKV, it is necessary to reset the transmission adaptations via a diagnostic scanner (for example, Launch X431). Otherwise, jerking may occur when changing gears!

What to do if the DPKV fastening bolt breaks?

If a bolt breaks off while unscrewing, don't panic. Take advantage extractor or drill out the remains with a drill diameter 8 mm. Then tap the new thread M10×1.25. In extreme cases, you can use a threaded bolt M10×1.5, but it will require more careful tightening.

Typical mistakes when replacing the crankshaft sensor

Even experienced car owners make mistakes that lead to repeated malfunctions. Here are the most common:

• 🔧 Tightening the fastening bolt. This deforms the sensor body and leads to false signals. Maximum torque - 10 Nm!
• 🧲 Installing the sensor with metal shavings. If you do not clean the seat, the chips will stick to the magnet and damage the new sensor in 1–2 months.
• 🔌 Incorrect connector connection. On some analogs, the polarity of the contacts is mirrored. Before installation, check the diagram!
• 🚗 Ignoring errors after replacement. If Check Engine does not go out, reset the errors with the scanner. Sometimes required throttle valve relearning.

Another common problem is wiring damage when disconnecting the connector. On Almera Classic The wires run along the oil pan and often rub against the edge. Before installing a new sensor, check the integrity of the insulation!

What to do if replacing the sensor did not help?

If after installing a new DPKV the problem remains, check:

1. Master disk status. On Almera Classic it may be damaged or contaminated with metal shavings. Clean it up soft brush (do not use sandpaper!).
2. Wiring integrity. Ring the wires from the sensor to the ECU (contacts 24 And 47 on the control unit connector).
3. ECU performance. On models up to 2003, control units (ECU) often “glitch” due to oxidized contacts. Remove the ECU cover and inspect the board.
4. On-board network voltage. If the battery is discharged (voltage below 11.8 V), the ECU may not read the signal from the sensor correctly.

If all checks fail, contact error log through a diagnostic scanner. For example, error P0340 (camshaft sensor malfunction) is often disguised as problems with DPKV.

FAQ: Frequently asked questions about replacing the crankshaft sensor on a Nissan Almera Classic

Is it possible to drive with a faulty crankshaft sensor?

No, it's dangerous! The sensor is responsible for synchronizing the operation of the fuel system and ignition. If it malfunctions, the engine may stall while driving, which can lead to an accident. In addition, long-term driving with the DPKV not working leads to re-enrichment of the fuel mixture and failure of the catalyst.

Which crankshaft sensor is better to choose for Almera Classic: original or analogue?

Original sensor (23731-4M500) more reliable, but more expensive. If your budget is limited, take analogues Bosch or Denso — they are practically not inferior in quality. Avoid cheap Chinese sensors (eg. NoName for 500 rubles), since they often fail after 10–20 thousand km.

Do I need to reset errors after replacing the sensor?

Yes, definitely! Even if Check Engine went out on its own, may remain in the ECU memory false errorsthat will affect engine performance. Use a scanner or disconnect the battery for 10 minutes (but the second method will reset all settings, including the radio and clock).

Is it possible to replace the crankshaft sensor without a pit or lift?

Yes, but it's inconvenient. On Almera Classic The sensor is located at the bottom of the engine, so to access it you will have to jack up the car or use low profile trolley jack. An alternative is to remove the right front wheel and skid plate (if equipped).

What happens if the sensor is installed incorrectly (for example, the polarity is reversed)?

Engine either won't start at all, or will work intermittently. In some cases, incorrect connection can cause damage transistors in the control unit (ECU). Always check the connection diagram!