Crankshaft Position Sensor Replacement

Mobile crankshaft position sensor replacement at your home or office, for stalling, no-start and intermittent cutting out.

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Service Info

Typical Duration 1.5 hours

We confirm the sensor rather than its wiring, the reluctor ring or a fuel fault is responsible by checking the live signal while cranking, replace the sensor with the specified part, then perform any required relearn and verify running.

Skip the garage, our master mechanics come to you

At your home or office
Fair & transparent pricing
6-month, 6000km warranty

The Most Trusted Mobile Crankshaft Position Sensor Replacement

The crankshaft position sensor tells the engine management exactly where the crankshaft is and how fast it is turning. Without that signal the engine cannot decide when to fire the spark or open the injectors, so it simply will not run. The classic failure is heat related: the car cuts out after twenty minutes of driving, refuses to start, then starts again once it has cooled. Michanic replaces crankshaft position sensors at your home or office.

Why Choose Our Mobile Crankshaft Position Sensor Replacement Services?

  1. Intermittent Faults Understood:
    A sensor that fails only when hot will test perfectly cold. Knowing that pattern is what leads to the right diagnosis rather than a fruitless search.
  2. No Tow Needed:
    A car that has cut out and will not restart is exactly where a mobile mechanic saves the most, because it is usually roadside.
  3. Wiring Checked Too:
    A chafed wire or a corroded connector near a hot engine produces the same symptoms as a failed sensor and costs far less to repair.
  4. Awkward Access Handled:
    These sensors often sit low on the block or behind the gearbox bellhousing, which is why the job takes longer than the part suggests.

Why We are the Best Choice for Mobile Crankshaft Position Sensor Replacement

  • Live Signal Checked:
    The sensor signal is watched while cranking, which distinguishes a dead sensor from a fuel or immobiliser fault immediately.
  • Reluctor Ring Inspected:
    A damaged or contaminated trigger ring produces the same fault codes, and replacing the sensor alone would not fix it.
  • Correct Part Fitted:
    These sensors are engine specific and sensitive to air gap. A generic substitute often gives an intermittent fault from day one.
  • Relearn Performed:
    Many vehicles need a crankshaft position relearn after replacement so misfire detection works correctly.

This sensor is the one that turns a car off without warning. Because the engine management cannot fire without a crank signal, the failure is instant and total: the engine stops as though the key had been turned off, which at speed means losing power steering and brake assistance at the same moment. The heat related version is particularly awkward because the car restarts after cooling, so the fault appears to have fixed itself and is easily dismissed until it happens somewhere worse.

Frequently Asked Questions

  • Why does my car stall when hot and restart when cool?
    That is the classic crankshaft position sensor failure. Heat causes the internal winding or its solder joints to break contact, so the signal drops out. As the sensor cools the connection returns and the car starts again.
  • Can a car run without a crankshaft position sensor?
    No. The engine management uses that signal to time the spark and the injectors, so without it there is no ignition or fuel delivery at all. The engine cranks normally but will not fire.
  • Is it the crankshaft or the camshaft sensor?
    They produce similar symptoms, though a failed camshaft sensor often still allows the engine to start with extended cranking. Fault codes and live data while cranking distinguish them reliably.
  • Does the sensor need relearning after replacement?
    On many modern vehicles yes. The engine management stores a correction for slight variations in the reluctor ring, and without a relearn the misfire detection system can report faults that are not there.
  • Could it be the wiring rather than the sensor?
    Very possibly. These sensors sit in a hot, exposed position and their wiring chafes and corrodes. The harness and connector are always checked before the sensor is condemned.