The diagnostic trouble codes (DTCs) P0171 and P0052 in a 2008 Vauxhall Zafira indicate issues related to the engine's air-fuel mixture and the oxygen sensor.
P0171 - System Too Lean (Bank 1):
P0052 - HO2S (Heated Oxygen Sensor) Heater Control Circuit High Voltage (Bank 2 Sensor 1)
So, let's replace the Bank 2 Sensor 1 oxygen sensor and then clear the codes to see if the P0171 comes back you may have a vacuum leak, here are two guides to help us see what's going on:
https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers
and
https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor
Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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Monday, September 18th, 2023 AT 11:24 AM