Why does the check engine light turn on due to faulty sensors in Honda City?

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Why does the check engine light turn on due to faulty sensors in Honda City?

The check engine light CEL often activates due to sensor-related issues, such as a faulty mass airflow sensor, O2 sensor, o r throttle position sensor. How can Honda City owners use an OBD2 scanner to identify sensor-related fault codes?

Sandeep asked on 04 Mar 2025 12:09:31 pm

1 Answer

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Car Mechanic Expert - on 04 Mar 2025 12:20:17 pm

The check engine light CEL in the Honda City can turn on due to a wide range of sensor-related issues. Common culprits include a faulty mass airflow MAF sensor, oxygen O2 sensor, o r throttle position sensor TPS. These sensors provide critical data to the engine control unit ECU, and if any of them malfunction, the ECU detects abnormal readings and triggers the CEL. The OBD2 scanner is an essential tool for diagnosing these issues, as it can read the fault codes stored in the vehicle’s computer system. For instance, a P0171 code may indicate a problem with the O2 sensor, while a P0101 code might indicate a MAF sensor issue. Once the fault codes are retrieved, Honda City owners can identify which sensor is faulty and take the necessary steps to repair o r replace it.