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DTC codes / P20xx · Fuel and air metering and auxiliary emission controls / P2081
P2081 means the powertrain control module (PCM) has detected an intermittent fault in the exhaust gas temperature (EGT) sensor circuit for bank 1 sensor 1, which is the upstream sensor closest to the engine. The PCM monitors the sensor signal for brief dropouts, erratic voltage spikes, or implausible readings that appear and disappear, rather than a hard failure that would set a continuous circuit code.
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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