Parts for your 2008 Daihatsu Bego-Camshaft sensor

2008 Daihatsu Bego camshaft sensor — purpose, servicing advice, and common questions

Based on technical sources including the Daihatsu Terios/Bego (J200 series) service manual, Toyota Rush (J200/J210) repair literature, and OEM parts catalogues for the 3SZ-VE (1.5L) and K3-VE (1.3L) engines, the 2008 Daihatsu Bego is fitted with a camshaft position sensor (CMP). These references describe a CMP mounted on the cylinder head at the timing-chain end, and list related diagnostic codes (such as P0340/P0341), confirming the sensor’s role in engine management and VVT-i control.

On a 2008 Bego, the camshaft sensor lets the ECU know exactly where the intake cam is in its rotation. That timing info is critical for sequential fuel injection, spark timing, and monitoring/adjusting the VVT-i system. When the CMP signal is clean and on time, cold starts are crisp, throttle response is smooth, and fuel economy stays on song. If the signal goes missing or drifts, the ECU can’t sync injection or verify cam phasing, which can lead to long cranks, misfires, flat spots, or a Check Engine light.

Typical symptoms of a crook or compromised CMP include:

• Hard starting or stalling after start
• Rough idle and hesitant acceleration
• Poor fuel economy and loss of punch
• Stored DTCs like P0340/P0341 (CMP circuit) or cam/crank correlation codes

The sensor itself is a solid-state Hall device and doesn’t need routine replacement. During regular servicing, it’s smart to pop the engine cover off and check the sensor’s connector and loom routing near the timing cover—heat and vibration can fatigue wiring. Keep engine oil quality up to scratch, sludgy oil can upset VVT-i operation and trigger timing correlation faults that look like a sensor drama. If you’re chasing intermittent faults, a careful clean of the sensor tip and a connector inspection can sort minor issues.

Replacement is straightforward under the bonnet: disconnect the battery negative, remove the engine cover, unplug the CMP, undo the single retaining bolt, and ease the sensor out. Lightly oil the new O-ring, seat it squarely, and tighten the bolt to the factory spec from the workshop manual. Clear codes, start the engine, and let it idle to stabilise. A quality OE or reputable aftermarket sensor is fine, avoid bargain-bin parts that can cause flaky signals. There’s no fixed kilometre interval for CMP replacement on a Bego—swap it when diagnostics point to a failed unit, or when wiring checks and oil maintenance haven’t resolved the fault.

FAQ: Where is the camshaft sensor on a 2008 Daihatsu Bego?
It sits on the cylinder head at the timing-chain end (front of the engine), typically on the intake side under the plastic engine cover. Look for a small, single-bolt sensor with a two- or three-pin plug.

FAQ: What fault codes point to a camshaft sensor issue?
Common codes are P0340 and P0341 for the CMP circuit. You may also see cam/crank correlation codes (such as P0016). Note that correlation faults can also be caused by VVT-i issues or timing-chain wear, so confirm with proper diagnostics.

FAQ: Can the camshaft sensor be cleaned or should it be replaced?
If the sensor tip is oily or has fine metallic fuzz, a careful clean and connector check can help. If the sensor has internal failure, drops signal when hot, or shows out-of-range readings, replacement is the go.