Why is the check engine light on in my Suzuki Wagon R even though the car drives fine?

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Why is the check engine light on in my Suzuki Wagon R even though the car drives fine?

My 2020 Suzuki Wagon Rs check engine light is staying on, but the car drives normally without any noticeable issues. I suspect a sensor might be malfunctioning. Could this be due to an oxygen sensor, MAP sensor, o r something else? How do I identify the faulty sensor without a scan tool?

Gari Specialist asked on 30 May 2025 13:26:12 pm

1 Answer

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Gari Master - on 30 May 2025 13:45:25 pm

A check engine light without obvious performance issues often means a sensor is reporting abnormal readings rather than a critical fault. Common sensor-related causes include:

Oxygen O2 sensor: Can trigger a check engine light if its reporting lean/rich mixtures, even if the car feels normal.

MAP Manifold Absolute Pressure sensor: A faulty MAP sensor can send incorrect engine load data, affecting fuel injection timing.

EVAP system sensor: A loose fuel cap o r a fault in the vapor purge valve can also trigger the light.

Crankshaft/Camshaft Position Sensor: Might trigger the light but not affect drivability—yet.

Fix:
Use an OBD-II scanner to check the error code most workshops in Pakistan offer this cheaply. Even if the car feels fine, ignoring the light may lead to more serious problems o r poor fuel economy over time.