P0131 Moderate Powertrain

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)

Common Causes

Lean fuel mixture causing sustained low voltage
Failed O2 sensor stuck lean
Exhaust leak near sensor

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Quick Info

Code P0131
System Powertrain
Severity Moderate

Disclaimer

This information is for diagnostic guidance only. Always verify repairs with a qualified technician before performing safety-critical work.

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