Introduction to the P0335 Code Problem

When on your dashboard Nissan Qashqai or another model, the “Check Engine” icon lights up and the scanner issues a code P0335, this is a signal of a serious malfunction in the engine management system. This code indicates that the engine control unit (ECU) is not receiving correct signals from the crankshaft position (CKP) sensor. Without this data, the ECU cannot synchronize the timing of fuel injection and spark formation, which makes starting the engine impossible or extremely unstable.

Many owners Nissan Teana or X-Trail They are faced with the fact that the engine stalls while driving or does not start at all. It is important to understand that the problem does not always lie in the sensor itself. Often the culprit is the wiring, connector, or even the crankshaft gear itself. Ignoring this error can lead to complete failure of the catalytic converter due to incorrect mixture formation.

Symptoms and manifestation of malfunction

The first and most obvious sign of an error is P0335 is the inability to start the engine. You turn the key, the starter turns the engine at normal speed, but the “start” does not happen. In some cases, if a malfunction occurs when the engine is already warm, the car may simply stall and not start again until the system cools down or reboots.

In addition to the lack of startup, you may experience the following symptoms:

  • 🚗 The engine starts, but is very unstable, with strong jerks and vibrations.
  • ⚡ A sharp loss of power when pressing the gas pedal, the car does not develop speed above certain values.
  • 🛑 Sudden engine stop while driving, even when driving in quiet mode.

Sometimes an error can only appear in the cold season or in high humidity, which often misleads inexperienced diagnosticians, forcing them to change parts one by one, instead of searching for the true cause.

⚠️ Attention: If the car stalls on a busy highway, do not try to repeatedly turn the starter. This can drain the battery and make the situation worse if the problem is with the control power supply.

The main causes of code P0335

The reasons for the failure can vary from trivial mechanical damage to complex electronic problems. Most often the culprit is oneself crankshaft position sensor. Over time, its magnetic properties are lost, or a break occurs inside the coil. It is also common that the sensitive part of the sensor is contaminated with metal shavings, which are attracted by a magnet and block the correct reading of the signal.

Electrical problems cannot be ruled out. An open or short circuit in the wiring harness leading to the sensor is a common cause. Engine vibration, especially on older models Nissan Patrol or Murano, can lead to chafing of the insulation and disruption of contact in the connector.

  • 🔌 Oxidation of contacts in the sensor connector due to moisture or antifreeze.
  • 🔧 Damage to the crankshaft ring gear (disc) - skipping or deformation of teeth.
  • 🔋 Problems with grounding the sensor itself or the engine control unit.

In rare cases, the problem lies in the control unit (ECU) itself, where the sensor signal processing output stage fails. However, this happens much less frequently than a sensor or wiring failure.

DIY system diagnostics

Before running to the store for a new sensor, it is necessary to conduct a thorough visual diagnosis. Inspect the sensor connector for oxidation, cracks, or signs of overheating. Check the integrity of the wires going to it. Often it is enough to simply clean the contacts and treat them with contact lubricant.

If there is no external damage, you will need a multimeter to measure the resistance. Disconnect the sensor connector and measure the resistance between the terminals. For most models Nissan With an MR or QR series motor, normal resistance is in the range of 300 to 800 ohms, but the exact values ​​should always be checked against the factory specification for the specific motor.

📊 What type of engine is installed on your Nissan?
  • MR20DE (2.0 l)
  • QR25DE (2.5 l)
  • VQ25/VQ35 (V6)
  • K9K (Diesel)
  • Other

It is also worth checking for clearance between the sensor and the toothed disk. It should be strictly within 0.5–1.0 mm. If the sensor is installed too close, it may cling to the disk; if it is too far away, the signal will be too weak.

⚠️ Attention: When checking the resistance of the sensor, do not forget to disconnect it from the vehicle wiring. Live measurements may give false readings due to parallel circuits in the system.
What to do if you don't have a multimeter?|If you don't have a multimeter, you can try installing a known-good sensor from a similar vehicle. If the error disappears and the engine starts, the reason is definitely in the old sensor. This is a “substitution” method that is often used in garage conditions.-->

Step-by-step instructions for replacing the sensor

Replacing the crankshaft position sensor on most engines Nissan does not require removal of the entire engine, but may be difficult to access. The sensor is usually located at the bottom of the cylinder block, near the crankshaft pulley or on the transmission. Before starting work, be sure to disconnect the negative terminal of the battery.

To do the job you will need a set of socket wrenches and possibly extensions. You will need to unscrew one or two sensor mounting bolts, disconnect the electrical connector and remove the old element. Be careful not to damage the wiring when removing it.

☑️ Preparing to replace the sensor

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