Parts for your 2011 Mazda 6-Crank angle sensor

2011 Mazda 6 crank angle sensor (crankshaft position sensor) – purpose, care and replacement

Yes, the 2011 Mazda 6 uses a crank angle sensor – more commonly listed by Mazda as the crankshaft position (CKP) sensor. Technical sources including the Mazda GH-series workshop manual (2008–2012) and wiring diagrams show the CKP sensor as a core engine management input, with relevant OBD-II codes such as P0335–P0339. Major parts catalogues for the L5‑VE 2.5 petrol, R2 2.2 diesel and the 3.7 V6 also list a crankshaft sensor for this model year, confirming it’s fitted across the range.

On the 2011 Mazda 6, the crank angle sensor tracks the exact position and speed of the crankshaft. The ECU uses this signal to fire the coils and injectors right on cue, stabilise idle, control fuel trims and manage variable valve timing. If the signal drops out or goes skew-whiff, the engine can stumble, misfire or stall, and starting becomes a chore.

This is not a scheduled service item, but it pays to keep it happy. The sensor lives low on the block (typically near the crank pulley or bellhousing, depending on engine), so it cops heat, oil mist and road grime. During routine servicing, a quick visual once-over is smart: check the 2–3 pin connector for corrosion, make sure the harness isn’t rubbing through on brackets, and look for oil leaks from the front cover that could contaminate the pickup. If there are hard-start complaints or the MIL is on, scan for CKP codes and confirm the signal with a scope rather than guessing.

• Common signs it’s on the way out: intermittent no-start, random stalling when hot, rough idle, reduced power, and a dead tacho during crank. The MIL may throw P0335/P0336.
• Replacement tips: disconnect the battery, let the engine cool, and work from underneath if access is tight. Clean the mounting face and reluctor area, route the loom exactly as per factory, and don’t overtighten the retaining bolt. Clear codes and perform a proper road test.
• Prevention: fix any front seal or rocker cover leaks early, keep the undertray fitted, and avoid yanking on the sensor harness during other repairs.

A genuine or quality OE-equivalent sensor generally restores crisp starting and smooth running straight away. For a 2011 Mazda 6 that sees plenty of Kiwi or Aussie kilometres, pairing the new sensor with fresh plugs and a thorough connector clean-up makes a noticeable difference.

Popular questions about the 2011 Mazda 6 crank angle sensor

Where is the crank angle sensor located on a 2011 Mazda 6?
On most 2.5 petrol models it’s mounted low on the engine block reading a reluctor on the crank, usually at the front near the crank pulley. Some variants place it by the transmission bellhousing. Access is often easier from underneath with the undertray off.

What are the symptoms of a failing crank angle sensor?
Expect intermittent no-start, stalling when hot, rough idle, hesitation and a check engine light with codes like P0335. The tachometer may sit dead during cranking and fuel economy can worsen as the ECU guesses timing.

Can it be driven with a dodgy crank angle sensor?
It might run briefly, but it can cut out without warning and leave the car stranded. It’s best to diagnose promptly and replace the sensor before it fails completely.