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ELECTRICALS 216 Sr. No. Displayed DTC Code DTC Description Fault cause Probable trouble Area 80 P0136 - 13 Downstream oxygen sensor signal open load Circuit open 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. 81 P0132 - 12 Upstream oxygen sensor circuit short to battery Circuit short to battery 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. 82 P0131 - 11 Upstream oxygen sensor circuit short to ground. Circuit short to ground 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. 83 P0134 - 64 Upstream oxygen sensor circuit signal not plausible Signal plausibility failure 1) Check for lambda sensor poisoning or contamination. 2) Check for Exhaust system leakage or soot formation. 3) Check for oxygen sensor connector.