What are the symptoms of a faulty crankshaft position sensor in a sedan?
2 Answers
The crankshaft position sensor in a sedan may fail to generate high voltage, stop fuel injection, or prevent the engine from starting. Here is some information about the crankshaft position sensor in sedans: 1. Function: The crankshaft position sensor determines the position of the crankshaft, specifically its rotational angle. It typically works in conjunction with the camshaft position sensor to determine the basic ignition timing. The engine ignites at the end of the compression stroke. 2. Usage: The engine control unit (ECU) calculates signals from both the crankshaft position sensor and the camshaft position sensor. The camshaft position sensor helps identify which cylinder's piston is at top dead center, while the crankshaft position sensor determines which piston is in the compression stroke. If the ECU does not receive a signal from the crankshaft position sensor, it will protect the engine by preventing ignition and fuel injection.
I've encountered this issue several times in the garage. When the crankshaft position sensor fails, the most obvious symptom is that the car won't start. You might try multiple times without success, with the engine just cranking without firing up. Even if it does start, it runs rough, shaking like it's dancing, and may suddenly stall, especially at traffic lights - super embarrassing. Acceleration feels weak, throttle response is sluggish, and fuel consumption skyrockets, hitting your wallet hard. The check engine light might come on as a warning, but don't ignore it. Delaying repairs could leave you stranded - I once had to call a tow truck during heavy rain, what a hassle. So at the first sign of trouble, head to a professional auto shop. Replacing the sensor only costs a few hundred bucks, saving both time and money.
