DTC codes / P22xx · Fuel and air metering (injector circuits) / P2253
P2253 indicates that the engine control module (ECM) has detected an abnormally high current on the negative control circuit of the upstream oxygen sensor on bank 1. The sensor's heater or signal return circuit is drawing more current than expected, which can affect sensor accuracy and emissions.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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