What does a high voltage O2 sensor mean?

High voltage (above 0.9V) means the exhaust is rich — too much fuel. Could be a bad sensor or a real rich condition.

Can too much fuel damage the catalytic converter?

Yes — prolonged rich running can overheat and destroy the catalytic converter. Fix the cause of P0132 promptly.

Medium Severity

Emissions System

Upstream O2 sensor on bank 1 is stuck at high voltage, indicating a rich condition.

Common Fix

Replace O2 sensor

Estimated Cost (DIY)

$30 - $100

Failed O2 sensor stuck richlikely

Fuel pressure too highpossible

Leaking fuel injectorpossible

Coolant leaking into combustion chamberunlikely

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What does a high voltage O2 sensor mean?: High voltage (above 0.9V) means the exhaust is rich — too much fuel. Could be a bad sensor or a real rich condition.
Can too much fuel damage the catalytic converter?: Yes — prolonged rich running can overheat and destroy the catalytic converter. Fix the cause of P0132 promptly.

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