How To Fix P2248 Code - O2 Sensor Reference Voltage Performance Bank 2 Sensor 1
How to fix P2248 code to stop your engine from running poorly and wasting gas. This oxygen sensor reference voltage code involves bank two sensor one, which is the upstream sensor responsible for monitoring your exhaust oxygen levels. When the reference voltage is out of spec, the powertrain control module cannot accurately calculate the air to fuel ratio, leading to poor engine performance and potential misfires. I show you how to inspect the sensor wiring for burns or chafing caused by the high heat of the exhaust system. We use a scanner to check if the sensor is cycling properly between one hundred and nine hundred millivolts once the engine reaches operating temperature. Checking for a blown oxygen sensor fuse is a quick first step, but often the sensor itself needs a replacement to restore the signal to the PCM. Fixing this reference voltage issue now protects your catalytic converter from expensive damage caused by a rich exhaust condition.
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