How reliable is the check engine light in identifying sensor-related issues in Changan Alsvin in Pakistan?

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How reliable is the check engine light in identifying sensor-related issues in Changan Alsvin in Pakistan?

Some users claim false warning lights o r error codes. Is the onboard diagnostic system too sensitive o r inaccurate?

Sirat Ul Jinan asked on 18 Jun 2025 13:08:56 pm

1 Answer

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Car Mechanic Expert - on 18 Jun 2025 13:25:43 pm

The CEL in Alsvin is functional but not foolproof:

It does detect real sensor faults, especially when voltages are out of range.

However, it can sometimes throw false codes due to:

Loose connectors

Minor voltage s

Grounding issues

Some Pakistani users report “phantom CEL” alerts that disappear after battery reset.

Proper scanning with a good OBD-II reader is essential to avoid unnecessary part replacements.