Nissan Cefiro A33 is a legendary business class sedan that is still popular due to its reliability and comfort. However, even such time-tested cars have weak points, and one of them is Crankshaft position sensor (CPS). This small but critical element is responsible for synchronizing the operation of the ignition and fuel injection systems. If it fails, the engine VQ20DE, VQ25DE or RB25DE starts to be capricious: it doesn’t start well, it stalls or stalls while driving.

In this article we will look at how recognize a faulty crankshaft sensor on Cefiro A33, what error codes indicate this, and how to check and replace the part yourself without contacting service. We will pay special attention subtleties of diagnostics on series engines VQ And RB, where the location of the sensor and its connector have key differences. We will also provide a table of compatibility between analogue and original spare parts so that you can choose the best option for repair.

Symptoms of a faulty crankshaft sensor Nissan Cefiro A33

Crankshaft sensor (or DPKV) is an inductive sensor that reads the position of the teeth on the flywheel or crankshaft pulley and transmits a signal to ECU (electronic control unit). If the signal disappears or is distorted, the engine loses its “reference points” and begins to work incorrectly. On Cefiro A33 with motors VQ20DE/VQ25DE And RB25DE symptoms of DPKV malfunction manifest themselves in different ways, but there are common “bells”:

  • 🚗 Engine won't start or starts with difficulty (especially when hot).
  • ⚡ Appear misfire, the engine “troubles” at idle or under load.
  • 📉 Power drops, the car “does not pull” when accelerating, “dips” occur.
  • 🔴 Lights up on the dashboard Check Engine, but the scanner gives errors P0335, P0336 or P0320.
  • 🔄 The engine stalls while driving and starts again only after a “break”.

On engines RB25DE (especially with a turbine) a faulty DPKV can provoke detonation due to incorrect ignition timing. And on VQ20DE/VQ25DE More often, problems with idle speed are observed - the speed “floats” or the engine stalls when the gas is released. It is important to note that other malfunctions can cause similar symptoms (for example, camshaft sensor or wiring problems), so diagnostics must be carried out comprehensively.

⚠️ Attention! If on Cefiro A33 with motor RB25DE after replacing the DPKV the engine still does not start, check flywheel ring gear condition. On these engines, teeth can become worn or broken, resulting in false sensor signals.

Error codes related to the crankshaft sensor

When reading errors by the scanner (for example, ELM327 or Consult III) DPKV malfunction on Nissan Cefiro A33 most often manifested by the following codes:

Error code Description Probable Cause
P0335 Crankshaft position sensor circuit malfunction Wire break, connector oxidation, sensor failure
P0336 DPKV signal range/performance Unstable signal due to sensor play or damaged flywheel teeth
P0320 Malfunction of the camshaft sensor circuit (may be false if there are problems with the camshaft sensor) Check both sensors - they work in pairs
P0300 Multiple misfires An indirect sign of problems with DPKV, if there are no other reasons

On Cefiro A33 with ECU series JECS or NEC errors may not appear immediately. For example, P0335 Sometimes it “blinks” only during a cold start or after a long trip. If the scanner shows several errors at the same time (for example, P0335 + P0300), start diagnostics with the crankshaft sensor - it is often to blame for the chain of faults.

📊 What engine is installed on your Nissan Cefiro A33?
  • VQ20DE
  • VQ25DE
  • RB25DE
  • RB25DET
  • Other

Where is the crankshaft sensor located on Nissan Cefiro A33

The location of the DPKV depends on the engine type. On Cefiro A33 it can be located in three places:

  1. Engines VQ20DE/VQ25DE: sensor installed on oil pan on the right (in the direction of travel) next to the crankshaft pulley. To see it, you need to remove the engine protection or look from the front right wheel.
  2. Engines RB25DE/RB25DET: DPKV is located on gearbox from the flywheel side. Access to it is difficult - you will have to remove the starter or use a mirror with a flashlight.
  3. Rare modifications (for example, CD20): The sensor may be located on the cylinder block closer to the gearbox.

On all versions Cefiro A33 the sensor is attached with one bolt (usually on 10 mm or 12 mm) and has a two-pin connector. Before removing it is necessary disconnect the battery terminalto avoid short circuit. Also note gap between sensor and flywheel - it must be within 0.5–1.5 mm. If the gap is larger, the signal will be weak, which will lead to errors.

How to check the sensor gap without a feeler gauge?

If you don’t have a probe at hand, use a strip of cigarette packaging (thickness ~0.1 mm) or a sheet of A4 paper folded in 10 layers (thickness ~1 mm).

How to check the crankshaft sensor for Nissan Cefiro A33

Diagnosis of DPKV can be done in three ways: visually, multimeter And oscilloscope. For most owners Cefiro A33 The first two methods are sufficient.

1. Visual inspection

  • 🔍 Check it out sensor housing integrity - cracks or chips indicate mechanical damage.
  • 🔌 Take a look connector and wires. Oxidation, breaks or melting are a common cause of false signals.
  • 🧲 Make sure there is no sticking on the sensor metal shavings or dirt (especially relevant for engines RB25DE, where the sensor is closer to the flywheel).

2. Check with a multimeter

To test resistance:

  1. Remove the sensor from the vehicle.
  2. Connect the multimeter probes to the sensor contacts (polarity is not important).
  3. Set resistance measurement mode (200–2000 Ohm).
  4. Normal resistance for Cefiro A33: 500–1500 Ohm (depending on the sensor manufacturer).

If resistance 0 ohm (short circuit) or ∞ (break), the sensor is faulty. You can also check inductance (for this you need a megohmmeter), but in garage conditions this is difficult.

Clean the installation site from dirt|Check the gap between the sensor and the flywheel|Lubricate the threads of the fastening bolt|Connect the connector only after complete installation-->

3. Checking with an oscilloscope (for advanced)

This method requires special equipment, but gives 100% results. Connect the oscilloscope to the signal wire of the sensor (usually yellow or green wire in the connector) and start the engine. The screen should display stable sine wave with clear peaks. If the signal is intermittent or absent, the sensor needs to be replaced.

⚠️ Attention! On engines RB25DE When checking with an oscilloscope, be sure to take readings on idling and at increased speed (2000–3000 rpm). On these engines, a malfunction of the DPKV can only appear under load.

Step-by-step instructions for replacing the crankshaft sensor

Replacing DPKV with Nissan Cefiro A33 - The procedure is simple, but requires accuracy. The main thing is not to damage the connector and set the gap correctly. Below is the instruction for engines VQ20DE/VQ25DE (for RB25DE the steps are similar, but access is more difficult).

Required tools:

  • 🔧 Head on 10 mm or 12 mm (depending on the fastening bolt).
  • 🔨 Extension cord and ratchet.
  • 🧲 Screwdriver with a flat blade (for removing the connector).
  • 📏 Feeler gauge for checking the gap (optional).
  • 🧴 WD-40 or similar cleaner (if the bolt is stuck).

Work order:

  1. Disconnect the battery (removing the negative terminal).
  2. Remove the engine protection (if it interferes with access).
  3. Disconnect the sensor connector. Press the latch and gently pull up.
  4. Unscrew the fastening bolt sensor Be careful - it may be too tight.
  5. Remove the sensor, rocking it from side to side (do not pull by force!).
  6. Clean the seat from dirt and oil.
  7. Install a new sensor, making sure he sat down all the way.
  8. Tighten the bolt moment 8–12 Nm (do not overtighten!).
  9. Connect the connector and check the gap (should be 0.5–1.5 mm).
  10. Connect the battery and start the engine to check.

After replacement, reset errors from ECU (you can disconnect the battery for 10 minutes or use a scanner). If the engine starts and runs smoothly, and errors do not return, the repair was successful.

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Before installing a new sensor, apply a little dielectric grease on the connector contacts - this will prevent oxidation and improve the signal.

Choosing a crankshaft sensor: original vs analogues

On Nissan Cefiro A33 Crankshaft sensors from different manufacturers were installed, depending on the year of manufacture and the sales market. Original spare parts are identified by article numbers:

  • 23731-4M000 - for engines VQ20DE/VQ25DE (until 2000).
  • 23731-4M005 - for VQ25DE (after 2000).
  • 23731-50X00 - for engines RB25DE/RB25DET.

The cost of the original sensor is from 3000 to 6000 rubles. However, there are proven analogues that are not inferior in quality:

Manufacturer Article Compatibility Approximate price, ₽
Hitachi CPS0004 All engines Cefiro A33 2200–2800
Mitsubishi MD340429 VQ20DE/VQ25DE 1800–2300
Bosch 0 261 210 115 RB25DE/RB25DET 2500–3000
Denso 550101-3710 Universal (suitable for everyone) 2000–2500

When choosing an analogue, pay attention to sensor body length And connector location. For example, sensors for VQ And RB They are similar in appearance, but have a different shape of the fastening “ear”. Also avoid cheap Chinese fakes - they often fail after 10–20 thousand km.

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On engines RB25DET (turbo) it is recommended to install only the original sensor or Hitachi - analogues may not withstand elevated temperatures.

Common mistakes when replacing DPKV and how to avoid them

Even experienced car owners sometimes make mistakes when replacing the crankshaft sensor with Nissan Cefiro A33. Here are the most common of them:

  • 🔧 Tightening the fastening bolt - this leads to deformation of the sensor body and distortion of the signal. The tightening torque should not exceed 12 Nm.
  • 🧲 Ignoring Gap between the sensor and the flywheel. If the gap is larger 1.5 mm, the signal will be weak if less 0.5 mm — the sensor may touch the flywheel.
  • 🔌 Connector damage when disconnected. On Cefiro A33 Connector retainers often break, so pull by the housing, not the wires.
  • 🚗 Unreset errors after replacement. If you don't reset ECU, the engine can continue to operate in emergency mode.
  • 🛠️ Using sealant during installation. The sensor must fit tightly without additional means - the sealant may get on the sensitive element.

Another typical problem is ingress of metal shavings to the end of the sensor. This is true for engines RB25DE, where the sensor is located next to the flywheel. Before installing a new DPKV, be sure to clean the seat compressed air or a brush.

⚠️ Attention! On Cefiro A33 with Automatic transmission when replacing DPKV it is sometimes required remove the box tray to access the sensor. If you are not confident in your abilities, it is better to contact a service center - the risk of damaging the gasket or automatic transmission filter is too great.

FAQ: Frequently asked questions about the crankshaft sensor on Nissan Cefiro A33

Is it possible to drive with a faulty crankshaft sensor?

Technically possible, but highly undesirable. The engine will operate in emergency mode: loss of power, increased fuel consumption, risk of detonation (especially at RB25DE). On some versions ECU may completely block startup after several unsuccessful attempts.

How to distinguish a malfunction of the DPKV from problems with the camshaft sensor?

In case of malfunction camshaft sensor (P0340) the engine usually starts, but runs unstable, and the error appears only at high speeds. DPKV manifests itself more often problems with starting or complete engine failure. For an accurate diagnosis, check both sensors with a multimeter.

How much does it cost to replace a crankshaft sensor at a service center?

In official services Nissan the price of the work is 1500–3000 rubles (depending on the complexity of access). In garage workshops - 800–1500 rubles. Self-replacement costs only the cost of the sensor.

Is it possible to clean the crankshaft sensor?

Cleaning is only possible outside (housing and connector contacts). The sensitive element inside the sensor cannot be wiped or washed - this will lead to its failure. If the sensor is contaminated with metal shavings, it is better to replace it.

Why is there an error after replacing the DPKV? P0335 left?

Possible reasons:

  • Defective new sensor (defect or fake).
  • Problems with wiring (break or short circuit between sensor and ECU).
  • Damaged flywheel ring gear (relevant for RB25DE).
  • Errors not reset ECU (you need to disconnect the battery for 10+ minutes).