ELECTRICALS 209 Sr. No. Displayed DTC Code DTC Description Fault cause Probable trouble Area 48 P0036 - 13 Downstream oxygen sensor heater control circuit open 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. 49 P0053 - 1B Upstream oxygen sensor heater resistance too high. Circuit resistance 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 for back out of pins at both sensor connector and ECU connector. 5) Check for damage of pins at both sensor connector and ECU connector. 6) Check the continuity from sensor connector pins to the ECU pins. 7) Faulty HO2S1 sensor. 8) Faulty ECU 50 P0032 - 12 Upstream oxygen sensor heater control short circuit 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.
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