Engine diagnostics on cars Nissan Primera Generation P12 often identifies specific trouble codes related to the ignition and fuel management system. One of the most common problems is the error P0335, which indicates a malfunction in the crankshaft position sensor circuit. This component plays a critical role in the operation of the power unit, since without its signals the control unit cannot correctly calculate the timing of fuel injection and ignition.
Ignoring this malfunction can lead to a complete failure to start the engine or its unstable operation at idle. Owners Nissan Primera with series motors QR or QG you need to understand that the code P0335 does not always mean failure of the sensor itself. The problem may be in the wiring, connectors, or even mechanical damage to the crankshaft damper, which requires a careful approach to diagnosis before replacing parts.
The essence of error P0335 and the role of the sensor in the control system
Code P0335 stands for "Crankshaft Position (CKP) Sensor Circuit Malfunction." The Electronic Control Unit (ECU) constantly monitors the signal coming from this device, comparing it with data from the camshaft position (CMP) sensor. If the signal from CKP is missing, interrupted or has an incorrect form, the system records an error and puts the engine into emergency mode or blocks the start.
For car Nissan Primera P12 this is especially true since the engine management system ECM uses data from the sensor to synchronize valve timing. Without this synchronization, the injectors cannot deliver fuel at the right time and the ignition coils cannot create a spark. As a result, the engine may start and stall immediately, or may not respond at all to turning the ignition key.
There are several reasons for such a failure, and they are not always associated with a breakdown of the sensor itself. Often the problem lies in oxidation of the contacts or mechanical damage to the wiring going to the control unit.
It is important to note that on series engines QR20DE And QG18DE, installed on Nissan Primera, the sensor is located at the bottom of the engine, which makes it difficult to access when replacing.
The main causes of failure on the Nissan Primera P12
When diagnosing, it must be taken into account that the sensor CKP is a sensitive element that responds to the slightest changes in the magnetic field. On Nissan Primera The most common cause of error is contamination of the sensing element with metal shavings or dirt. This occurs due to wear of internal engine components when friction products enter the sensor housing.
Another common problem is an open or short circuit in the wiring harness. Vibrations typical of older cars can cause the insulation to fray or the contacts in the connector to peel off. It is also worth checking the condition of the crankshaft damper, on which the toothed disk is located. If the disk teeth are deformed or one of them is missing, the sensor will produce incorrect data, causing an error P0335.
Sometimes the problem may be software or related to incorrect operation of the engine control unit itself, although this happens extremely rarely.
Particular attention should be paid to wiring running near hot parts of the engine, as overheating can cause insulation deformation and subsequent short circuit.
- 🔍 Contamination of the sensitive area of the sensor with metal shavings or oil.
- 🔌 Oxidation of contacts in the sensor connector or broken wires.
- ⚙️ Mechanical damage to the toothed disc on the crankshaft damper.
- 🔋 Low voltage in the on-board network or problems with grounding the control unit.
Diagnostics and troubleshooting
Before purchasing a new sensor, it is necessary to conduct a thorough diagnosis. Use a multimeter to check the sensor winding resistance. Normal values for Nissan Primera P12 are usually in the range from 500 to 1500 Ohms, but it is better to check the exact numbers in the technical documentation for a specific year of manufacture.
It is also necessary to check the presence of a signal at the sensor connector when cranking the starter. If there is no signal, check the continuity of the circuit to the control unit. In some cases, it helps to visually inspect the connector for oxidation or moisture that could have gotten inside through a loose fit.
If the resistance is normal, but there is no signal, the problem may be in the control unit itself or in the mechanical part of the engine.
Check the gap between the sensor and the toothed disk, it should meet factory specifications, usually 0.5-1.5 mm.
- Engine won't start
- The engine stalls while driving
- The error appears periodically
- The engine is unstable
Step-by-step instructions for replacing the sensor
The process of replacing the crankshaft position sensor with Nissan Primera P12 requires access to the bottom of the engine. First you need to remove the crankcase protection and, if necessary, the right wheel and fender liner for ease of operation. Disconnect the negative terminal of the battery to avoid short circuit when disconnecting the connector.
Disconnect the electrical connector of the sensor by pressing the latch. Unscrew the sensor mounting bolt and carefully remove it. Pay attention to the condition of the O-ring, which often breaks when removed. Before installing a new sensor, clean the mounting area from dirt and oil.
☑️ Preparation for replacement
Install the new sensor, making sure the O-ring is level. Tighten the mounting bolt to the recommended torque to avoid damaging the housing.
Connect the connector and restore all dismantled elements. After starting the engine, check if the error disappears.
⚠️ Attention: When installing a new sensor, be sure to replace the O-ring. Using an old ring can cause oil to get inside the sensor and cause it to fail again.
Error reset and system adaptation
After replacing the sensor, it is necessary to reset the error code from the control unit memory. This can be done using a diagnostic scanner by connecting it to the OBDII connector. If you don't have a scanner, you can try disconnecting the battery for 10-15 minutes, but this method is not always effective for resetting adaptations.
On some versions Nissan Primera After resetting the error, an idle speed learning procedure is required. To do this, warm up the engine to operating temperature, then let it idle for 5-10 minutes without touching the gas pedal. This will allow the control unit to re-adapt to new operating conditions.
If the error does not clear, the problem may not be with the sensor, but with the wiring or control unit.
Sometimes resetting adaptations through specialized software, such as Consult or its analogues, helps.
| Parameter | Meaning | Unit of measurement |
|---|---|---|
| Winding resistance | 500 - 1500 | Ohm (Ω) |
| Disc clearance | 0.5 - 1.5 | mm |
| Bolt tightening torque | 8 - 10 | Nm |
| Supply voltage | 5 | B |
What should I do if an error is returned?
If P0335 returns after replacing the sensor, check the continuity of the wiring to the control unit. Often a break occurs inside the harness in hard-to-reach places. Also check the condition of the crankshaft damper - if the teeth are worn or the disc is misaligned, a new sensor will not help. In rare cases, the problem may be in the engine control unit itself.
Prevention and operating tips
To avoid the error reappearing P0335, regularly inspect the sensor and wiring. Engine cleanliness is important: oil and dirt can get on the contacts and cause oxidation. Use high-quality gaskets and seals when changing the oil or doing other work in the engine compartment.
Monitor the condition of the crankshaft damper. If extraneous knocks or vibrations appear in the lower part of the engine, it is worth conducting in-depth diagnostics. Timely replacement of valve stem seals and rings will also help reduce the amount of wear debris that can contaminate the sensor.
Regular diagnostics of electrical circuits will help identify problems at an early stage, before they lead to engine failure.
Do not skimp on the quality of spare parts: cheap sensors may have unstable characteristics and quickly fail.
Before purchasing a new sensor, be sure to compare its markings with the factory part. On Nissan Primera There are different modifications of sensors for different years of manufacture and engine types.
Features of QR and QG series engines
By car Nissan Primera P12 the most common series engines are QR20DE And QG18DE. These motors have their own design features that affect the location and operation of the crankshaft position sensor. On the engine QR20DE The sensor is located closer to the flywheel, which sometimes makes access difficult when replacing.
For engines QG18DE characterized by high sensitivity to fuel quality and the state of the ignition system. Error P0335 on these engines may be accompanied by power failures and increased fuel consumption. It is important to note that when replacing the sensor on these engines, more careful adjustment of the clearances may be required.
Differences in design may affect sensor selection, so please include vehicle VIN when ordering parts.
Some owners note that the original sensors last much longer than their counterparts, especially under high-load operating conditions.
Correct diagnosis and use of original spare parts is the key to long-lasting operation of the ignition system on the Nissan Primera P12.
Conclusion
Error P0335 on Nissan Primera P12 - this is a serious signal that requires immediate attention. Ignoring the problem can lead to costly engine repairs or complete vehicle failure on the road. Regularly checking the condition of the sensor and wiring will help avoid unexpected breakdowns.
Remember that accurate diagnosis is the key to successful repairs. Do not replace parts at random, but use diagnostic equipment and technical data. Compliance with operating recommendations and timely maintenance will ensure long and reliable operation of your car.
Is it possible to drive with this error?
You can get to the service station for a short time, but only if the engine is running and does not stall. However, constant operation in emergency mode can lead to damage to the catalyst due to incorrect mixture formation. It is better to fix the problem as soon as possible.
Why does P0335 appear after replacing the sensor?
If the error appears after replacing the sensor, the new sensor may be faulty or installed incorrectly. It is also worth checking the gap between the sensor and the toothed disk, as well as the integrity of the wiring. Sometimes the problem lies in the control unit, which has not adapted to the new sensor.
How to reset an error without a scanner?
Try disconnecting the negative terminal of the battery for 15-20 minutes. After connecting, start the engine and let it idle until it warms up. If the error does not clear, you will need a diagnostic scanner or professional equipment.
Can I replace the sensor myself?
Yes, replacing the crankshaft position sensor with Nissan Primera P12 available for self-execution. However, you will need access to the underside of the engine and a basic set of tools. If you are not confident in your abilities, it is better to turn to specialists.
Does P0335 affect fuel consumption?
Yes, P0335 can significantly increase fuel consumption. The control unit, not receiving correct data on the position of the crankshaft, goes into emergency mode, enriching the mixture. This leads to excessive fuel consumption and increased exhaust toxicity.