1057 / 1904
ELECTRICALS
126
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.