annamaier1

Camshaft Sensor Issue

My 2021 Hyundai Santro with a gasoline engine starts poorly, sometimes stalls at idle, and the check engine light is on. Scanner says defective camshaft sensor. Mileage is 181077 km. Is the encoder wheel on the camshafts the likely culprit?

A 2021 Hyundai Santro with a gasoline engine is experiencing poor starts, stalling at idle, and an illuminated check engine light. The diagnostic scanner indicates a defective camshaft sensor with code P0340, suggesting a camshaft position sensor 'A' circuit malfunction. Despite initial checks showing no wiring issues, the problem is likely due to a defective encoder wheel on the camshaft. The issue was confirmed and resolved at a workshop.

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4 comment(s)

I had similar issues with my Santro: rough starts, stalling, and the check engine light. Before replacing the sensor, did you check the wiring and connections? A loose or corroded connector can cause false readings. Also, what specific code is the scanner throwing?

Wiring and connections appear solid, no visible corrosion. The code is P0340, indicating a camshaft position sensor 'A' circuit malfunction. Could this still be wiring even with a specific code?

P0340 does point strongly towards the sensor itself or its immediate circuit. While a wiring issue is possible, given the code and your checks, the encoder wheel is the more probable cause. I ended up taking mine to a workshop, they diagnosed the same issue.

Thanks for the confirmation. I took it to a workshop, and you were right. The encoder wheel on the camshaft was indeed defective, causing the sensor to throw errors. Repair cost came to 695€. Appreciate the help.

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HYUNDAI

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SANTRO