Parts for your 2009 Suzuki Sx4-Camshaft sensor

2009 Suzuki SX4 Camshaft Sensor — what it does and how to look after it

Based on Suzuki’s own technical literature and industry catalogues, the 2009 Suzuki SX4 does use a camshaft position sensor (CMP). The Suzuki SX4 Service Manual for 2007–2010 (Engine/EC sections) describes CMP operation and diagnostics (including DTCs P0340/P0341), and Suzuki’s Electronic Parts Catalogue lists a CMP for the SX4’s common engines of the era (M16A 1.6L petrol, J20-series 2.0L petrol, and the DDiS diesel where fitted). Major aftermarket catalogues also supply a CMP for the 2009 SX4, confirming its fitment across markets.

On this model, the camshaft sensor feeds the ECU precise camshaft phase information. Paired with the crank sensor, it lets the ECU fire the injectors sequentially, time ignition accurately, and manage variable valve timing on engines equipped with VVT. If the CMP signal is missing or erratic, the SX4 may crank longer, run roughly, lose performance, or in some calibrations not start at all. The Check Engine light commonly flags codes like P0340 or P0341 when the signal is out of whack.

There’s no scheduled replacement for the CMP — it’s a fit-and-forget hall-effect sensor — but it does live under the bonnet where heat and oil vapour are a thing. During routine servicing, it’s worth a quick visual check: make sure the connector is snug, the wiring isn’t chafed, and there’s no oil wicking into the plug from a leaking rocker cover. If replacement is needed, it’s a straightforward job on most SX4 engines: disconnect the battery, unplug the sensor, remove the single retaining bolt, lift the sensor out, swap the O-ring, lightly oil the new O-ring, refit, and tighten the bolt to the service manual spec (around 8–10 N·m is typical). Clear any stored fault codes and confirm cam/crank sync with a scan tool.

Common symptoms of a crook cam sensor on a 2009 SX4 include:

• Hard starting or extended cranking, especially warm
• Rough idle, misfire, or flat spots under load
• Poor fuel economy and reduced power
• Check Engine light with DTCs P0340/P0341

Location-wise, expect the CMP at the cylinder head near the cam cover: typically at the front end of the intake cam on M16A petrol models, and near the timing chain cover area on 2.0L petrol variants. Access is usually easy with basic hand tools — a win for driveway servicing on this tidy little hatch.

Popular questions

Where is the camshaft sensor on a 2009 Suzuki SX4?
On most M16A 1.6L petrol SX4s, it’s at the front of the cylinder head by the timing chain cover, reading the intake cam. On 2.0L petrol engines, it’s also on the head near the cam cover at the chain end. DDiS diesels place it on the head as well, often near the vacuum pump area. Look for a small, single-bolt sensor with a three-wire plug.

What fault codes point to a bad camshaft sensor on an SX4?
The usual suspects are P0340 (Camshaft Position Sensor Circuit) and P0341 (Camshaft Position Sensor Range/Performance). You might also see misfire codes if timing control is affected. Always check the wiring and connector first, then the sensor, and verify cam/crank synchronisation with a scan tool.

Can a 2009 SX4 run with a failed camshaft sensor?
Sometimes it’ll crank longer and run in a limited strategy using the crank sensor, with roughness and no VVT, but certain calibrations may not start at all. Even if it runs, it’s not ideal — expect poor drivability and higher fuel use until the CMP issue is fixed.