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ELECTRICALS 213 Sr. No. Displayed DTC Code DTC Description Fault cause Probable trouble Area 68 P0139 - 26 O2 sensor circuit slow response(bank 1 sensor2) - signal rate of change below threshold Signal rate of change below threshold 1) Loose/ damaged connections or intermittent fault. 2) Sensor supply line short circuit to battery/ ground. 3) Sensor signal line short circuit to battery/ ground. 4) Check the continuity from sensor connector pins to the ECU pins. 5) Check for back out of pins at both sensor connector and ECU connector. 6) Check for damage of pins at both sensor connector and ECU connector. 7) Faulty downstream HO2S2 sensor. 8) Faulty ECU. 69 P0139 - 27 O2 sensor circuit slow response(bank 1 sensor2) - signal rate of change above threshold Signal rate of change above threshold 1) Loose/ damaged connections or intermittent fault. 2) Sensor supply line short circuit to battery/ ground. 3) Sensor signal line short circuit to battery/ ground. 4) Check the continuity from sensor connector pins to the ECU pins. 5) Check for back out of pins at both sensor connector and ECU connector. 6) Check for damage of pins at both sensor connector and ECU connector. 7) Faulty downstream HO2S2 sensor. 8) Faulty ECU. 70 P0133 - 26 Upstream oxygen sensor slow response Signal rate of change below threshold 1) Loose/ damaged connections or intermittent fault. 2) Sensor supply line short circuit to battery/ ground. 3) Sensor signal line short circuit to battery/ ground. 4) Check the continuity from sensor connector pins to the ECU pins. 5) Check for back out of pins at both sensor connector and ECU connector. 6) Check for damage of pins at both sensor connector and ECU connector. 7) Faulty upstream HO2S1 sensor. 8) Faulty ECU. 71 P0692 - 12 A/C fan 1 control circuit high - circuit short to battery Circuit short to battery 1. Check with the connectivity. 2. Faulty ECU.