Where is the crankshaft sensor located on the Sylphy?
3 Answers
The crankshaft sensor on the Sylphy is installed on either the flywheel side or the crankshaft pulley side of the engine. The principle of the crankshaft position sensor is to provide ignition timing by confirming the crankshaft position, which is used to detect the crankshaft angle at the piston top dead center and the engine speed. The function of the crankshaft position sensor is to determine the position of the crankshaft, specifically the crankshaft angle and engine speed. The Sylphy's body dimensions are 4631mm in length, 1760mm in width, and 1503mm in height, with a wheelbase of 2700mm. The 2019 National VI version of the Sylphy is equipped with a 1.6-liter inline 4-cylinder naturally aspirated engine, where 1.6 refers to the engine displacement of 1.6 liters.
I remember when I went to fix the engine issue with my Nissan Sylphy last time, the technician told me that the crankshaft position sensor is usually hidden at the front lower part of the engine bay, near the flywheel or the cylinder block at the end of the crankshaft. It's quite concealed but you can spot a small black probe. Its job is to monitor the crankshaft's speed and angle, sending signals to the ECU to control fuel injection and ignition timing. If it's positioned too off, it may collect incorrect data. For specific Sylphy models, like the newer 1.6L engine, the sensor might be located on the left front side near the transmission, requiring the removal of the air filter box or some covers to locate it clearly. If this part fails, the car may experience hard starts or significant RPM fluctuations, and the engine light will come on. For safety, I always recommend checking the manual first to locate it properly and avoid touching it randomly to prevent damaging the wiring harness. It's more reassuring to have a professional shop help replace it, as DIY requires technical experience.
As a long-time Sylphy owner, my car had this exact issue last year – a faulty crankshaft sensor causing the engine to intermittently stall and restart. It took considerable effort to locate and replace it. The sensor is positioned beneath the engine bay, adjacent to the flywheel, typically at the rear side of the transmission for Sylphy models. You'll need to crouch down or use a vehicle lift for proper visibility. This small but critical component monitors crankshaft rotation details – poor signal transmission causes engine shuddering. I recall its position varies by engine year: older models place it slightly forward on the cylinder block, while newer versions position it more towards the right. I always advise novice owners to first disconnect the battery negative terminal before checking for loose wiring connections. When the location proves tricky, photographing the setup helps prevent installation errors that could compound problems. Addressing this promptly prevents roadside breakdowns disrupting travel plans.
