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DTC codes / P20xx · Fuel and air metering and auxiliary emission controls / P2026
P2026 means the powertrain control module (PCM) has detected a low-voltage signal on the evaporative emissions (EVAP) fuel vapor temperature sensor circuit, indicating the sensor is reporting an unrealistically cold temperature or the circuit is shorted to ground. The PCM expects the sensor's voltage to stay within a calibrated range as fuel vapor temperature changes, and a sustained low reading triggers this 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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