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P1647 – All makes

Code : P1647
Make : All makes
Description : P1647 HO2 Sensor Control Malfunction Bank 2 Upstream
Possible causes :
– Faulty Upstream HO2 Sensor Bank 2
– Upstream HO2 Sensor Bank 2 harness is open or shorted
– Upstream HO2 Sensor Bank 2 circuit poor electrical connection
– Faulty Powertrain Control Module (PCM)
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.

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