Nissan Sunny FB15 with engine GA15DE — a reliable car, but even it is not immune to problems with electronics. One of the weak points of the model is Camshaft position sensor (CPR), which is responsible for synchronizing the operation of the ignition and fuel injection systems. If it fails, the engine begins to “trouble”, loses power or refuses to start at all.
In this article we will look at how to recognize a faulty camshaft sensor on Sunny FB15, what error codes (For example, P0340 or P0345) indicate its breakdown, and how to replace the part yourself - with photos, diagrams and step-by-step instructions. You will also find out what analogues of the original sensor (23731-4M500) suitable for installation and how to avoid common mistakes during repairs.
How does the camshaft sensor work? Nissan Sunny FB15?
Camshaft position sensor Camshaft Position Sensor, CPS) in Sunny FB15 - this is inductive or Hall sensor, which reads signals from the toothed disk on the camshaft. This data is transmitted to ECU (electronic control unit), which corrects:
- 🔥 Ignition timing - so that the air-fuel mixture ignites at the optimal moment.
- ⛽ Fuel supply - for precise injection into cylinders.
- 🔄 Valve timing (in engines with system VVTi, if provided).
On GA15DE the sensor is located on cylinder head (from the timing belt side) and is secured with one bolt. The signal from it comes through a three-wire circuit: +12V, mass And signal wire. If the sensor fails, ECU goes into emergency mode, using data only from crankshaft sensor - this leads to loss of power and increased fuel consumption.
- GA15DE (1.5 l)
- GA16DE (1.6 l)
- SR20DE (2.0 L)
- Other
Symptoms of a Malfunctioning Camshaft Sensor
Symptoms of DPRV failure Sunny FB15 often confused with malfunctions ignition coils, injectors or fuel pump. However, there are specific “bells” that directly point to the sensor:
- ⚡ The engine starts after 3-5 attempts or stalls immediately after starting.
- 🚗 Jerks during acceleration (especially at speeds of 60–90 km/h).
- 🛑 Check Engine lights up 5–10 minutes after start.
- 🔧 Errors P0340/P0345 during diagnosis (but not always!).
- 💨 Floating speed at idle (from 500 to 1500 rpm).
Important: if the sensor fails completely, the engine may won't start at all — ECU does not “see” the position of the camshaft and blocks the fuel supply. In this case, check EFI fuse (15A) and fuel pump relay - sometimes the problem lies in them.
⚠️ Attention! On Sunny FB15 with automatic transmission a faulty DPRV can cause hard gear shifts or blocking the automatic transmission in emergency mode. Don't ignore this symptom!
Error codes associated with DPRV on Nissan Sunny
When scanning OBD-II The most common codes indicating problems with the camshaft sensor are:
| Error code | Description | Probable Cause |
|---|---|---|
P0340 |
No camshaft sensor signal | Broken wiring, oxidation of contacts, sensor malfunction |
P0345 |
Sensor A Circuit Malfunction (Bank 1) | Short circuit, damaged wiring harness |
P0335 |
Crankshaft sensor circuit problems (secondary symptom) | DPRV gives false signals, ECU gets lost |
P0300 |
Multiple Misfire (multiple misfires) | The sensor gives incorrect data, disrupting the advance angle |
Important: code P0340 may also appear when broken timing belt or teeth jumping. Before replacing the sensor, be sure to check the alignment of the marks on the camshaft and crankshaft!
What should I do if the scanner shows P0340, but the sensor is good?
In 20% of cases, error P0340 on the Sunny FB15 occurs due to oxidation of the contacts in the sensor connector or a break in the signal wire near the harness near the thermostat. Check the circuit with a multimeter: the resistance between pins 1 and 2 should be 500–900 Ohms (depending on temperature).
How to check the camshaft sensor for Nissan Sunny FB15?
Diagnosis of DPRV can be carried out without removal using multimeter or oscilloscope. Step by step instructions:
- Visual inspection:
- 🔍 Check the integrity of the wires and connector (they often rub against the intake manifold).
- 🧲 Make sure that there are no metal filings stuck to the sensor (they distort the signal).
- Chain continuity:
- Disconnect the sensor connector.
- Measure the resistance between the contacts
1 and 2(norm: 600–800 Ohm). - Check the voltage between
pin 3and weight when the ignition is on (should be 12V).
- Signal check (advanced method):
- Connect the oscilloscope to the signal wire (
pin 2). - When cranking with the starter, it should display sinusoid with amplitude 0.5–5V.
- Connect the oscilloscope to the signal wire (
☑️DPRV diagnostics on Sunny FB15
If the sensor does not produce a signal, but the circuit is working, it needs to be replaced. Original article: 23731-4M500 (Nissan), but analogues from Denso (555-6001) and Bosch (0261210113) are suitable.
Step-by-step replacement of the camshaft sensor with Nissan Sunny FB15
To replace you will need:
- 🔧 Key on 10 mm (for fastening bolt).
- 🔌 Screwdriver with a flat blade (for removing the connector).
- 🧴 WD-40 (if the bolt is sour).
- 📦 New sensor (original or analogue).
Instructions:
- Disable
negative battery terminal(required!). - Press the latch and disconnect the sensor connector.
- Unscrew the fastening bolt with a 10 mm wrench.
- Carefully remove the sensor by rocking it from side to side (do not use force!).
- Clean the seat from dirt and oil.
- Install the new sensor, tighten the bolt firmly 8–10 Nm.
- Connect the battery connector and terminal.
⚠️ Attention! After replacing the sensor reset errors through a scanner or by disconnecting the battery for 10 minutes. If Check Engine lights up again - check wiring or timing marks.
Before installing a new sensor, apply a little dielectric grease to the O-ring - this will prevent moisture from entering and oxidizing the contacts.
Common mistakes when replacing DPRV and how to avoid them
Even experienced car owners make mistakes that lead to repeated breakdowns. That's what can't do:
- 🛠️ Use non-original sensors without testing — cheap analogues (for example, no-name from AliExpress) often produce an incorrect signal.
- 🔌 Do not check the connector for oxidation - even a new sensor will not work with damaged contacts.
- 🔧 Tighten the fastening bolt - this deforms the sensor body and leads to false alarms.
- 🚗 Do not reset errors after replacement — ECU will continue to operate in emergency mode.
Also note timing belt condition: If it is worn out or has jumped 1-2 teeth, the new sensor will quickly fail due to misalignment of the marks.
If the engine runs unstably after replacing the sensor, check gap between sensor and toothed disk - he must be 0.5–1.5 mm. If necessary, place a washer.
Repair cost: original vs analogues
Camshaft sensor prices for Nissan Sunny FB15 vary depending on the manufacturer:
| Manufacturer | Article | Price, ₽ | Notes |
|---|---|---|---|
| Nissan (original) | 23731-4M500 | 3 500–4 800 | 1 year warranty, best quality |
| Denso | 555-6001 | 2 200–2 800 | Japanese quality, fits without modifications |
| Bosch | 0261210113 | 1 800–2 300 | Good analogue, but check compatibility |
| ERA | 550456 | 1 200–1 500 | Budget option, resource ~50 thousand km |
Cost of replacement work in the service: 800–1 500 ₽. However, the procedure is so simple that it can be easily done on your own in 20–30 minutes.
FAQ: Frequently asked questions about the camshaft sensor Nissan Sunny FB15
Is it possible to drive with a faulty DPRV?
Technically possible, but not recommended. The engine will operate in emergency mode, which leads to:
- ⬆️ Increased fuel consumption by 15–20%.
- ⚡ Risk of damage to the catalyst due to improper combustion of the mixture.
- 🔥 Engine overheating (due to violation of gas distribution phases).
The maximum is to get to the service center, but do not use the car for a long time.
Why doesn't P0340 go away after replacing the sensor?
Probable reasons:
- 🔌 Poor contact in the connector (oxidation or wire breakage).
- 🔧 Timing timing marks do not match (check belt tension).
- 🛠️ Defective sensor (especially if you bought a cheap analogue).
- 💻 Firmware failure ECU (need to reset adaptations via diagnostic scanner).
How to distinguish a DPRV malfunction from problems with the crankshaft sensor?
In case of breakdown crankshaft sensor (CKP) engine won't start at all, since ECU cannot determine the position of the pistons. If the DPRV motor malfunctions:
- ✅ Starts, but with difficulty.
- ✅ Works unstably (troubles, speed fluctuates).
- ✅ Loses power when accelerating.
The error codes are also different: they are typical for DKV P0335, P0336.
Do I need to reset adaptations after replacing the sensor?
Yes, it is desirable. B Nissan Sunny FB15 ECU “remembers” the operating parameters of the old sensor. After replacement:
- Clear errors with the scanner (for example, ELM327).
- Or remove the battery terminal for 10–15 minutes to reset the adaptations.
- Start the engine and let it idle for 5-10 minutes - ECU “learn” a new sensor.