Keep ignition and fuel timing in sync with the Standard Ignition Engine Crankshaft Position Sensor PC443. It installs as a direct-fit replacement for the 1999-2003 Mazda Protege, reading the crankshaft's rotational position and speed and reporting it to the powertrain control module (PCM).
The PCM relies on that reference signal to schedule ignition spark and fuel injection. As the original sensor degrades, the engine can lose the timing reference it needs to run correctly.
- Core job: monitors crankshaft position and speed, sending the reference signal the PCM uses to time spark and fuel delivery.
- Signs it may need replacing: hard starting, intermittent stalling, misfires, a no-start condition, or an illuminated check engine light — if a failed crankshaft position sensor is the cause, this replaces it.
- Application: a direct-fit replacement for the listed 1999-2003 Mazda Protege applications.
Because these symptoms can have other causes, diagnose the fault before replacing the sensor.
Interchange: Manufacturer part number PC443.
Frequently Asked Questions
What does the PC443 crankshaft position sensor do?
It monitors the crankshaft's position and rotational speed and sends that signal to the PCM, which uses it to time ignition spark and fuel injection.
What vehicles does the PC443 fit?
It is a direct-fit replacement for the 1999-2003 Mazda Protege. See the Buyer's Guide tab to confirm fitment for your vehicle.
What are the signs of a failing crankshaft position sensor?
Common signs include hard starting, intermittent stalling, misfires, a no-start condition, or an illuminated check engine light.
Will replacing this sensor fix my stalling or no-start?
If a failed crankshaft position sensor is the cause, this replaces it. Because those symptoms can have other causes, diagnose the fault first.
What is the manufacturer part number?
The manufacturer part number is PC443 from Standard Ignition.
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