ELECTRICALS 210 Sr. No. Displayed DTC Code DTC Description Fault cause Probable trouble Area 51 P0031 - 11 Upstream oxygen sensor heater control short circuit 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. 52 P0030 - 13 Upstream 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 upstream HO2S1 sensor. 8) Faulty ECU. 53 P0351 - 12 Ignition coil primary circuit short to battery Circuit short to battery 1) Loose /damaged connector. 2) IGN coil control line short to battery/ ground. 3) Check the continuity from ignition coil connector pins to the ECU pins. 4) Check for back out of pins at both ignition coil connector and ECU connector. 5) Faulty ignition coil/ HT leads/ spark plugs. 6) Faulty ECU. 54 P0351 - 1D Max error (SCB) in IGBT channel A with faulty system voltage Circuit current out of range 1. Check with the connectivity. 2. Faulty ECU 55 P0420 - 92 Catalyst system efficiency below threshold - performance or incorrect operation Performance or incorrect operation 1) Check catalyst 2) Check connection of Lambda sensor (Front and Rear), might be leakage. 56 P0647 - 12 A/C clutch relay short to battery Circuit short to battery 1) Loose/ damaged connections. 2) Check for back out of pins at ECU connector. 3) Faulty ECU.
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