1284 / 1428
ENGINE
DTC
DESCRIPTION
CAUSE
DIAGNOSTIC
LAMP (
MIL
)
DIAGNOSTIC
LAMP (
CEL
)
Gil When
Driven In CNG
PROBABLE TROUBLE AREA
P0300
Random Misfire
Any one cylinder
misfiring, But
cylinder detection
not done.
-
-
-
1) Loose /Damaged Connections.
2) Faulty IGN System (spark plugs, ht cables, connections etc.)
3) Faulty/ Clogged INJECTORS.
4) Low COMPRESSION PRESSURE.
5) Improper VALVE CLEARANCE
6) Improper VALVE TIMING.s
7) Faulty ECT SENSOR.
8) Loose Connector/ Faulty ECU.
1) When misfire
percentage is more
than a calibrated
OBD emission
threshold
ON
OFF
Special
Case
2)When the misfire
percentage is more
than the catalyst
damaging index
ON
Blinking
OFF
Special
Case
P0301
Cylinder 1 Misfire
Mis-fire fault,
cylinder 1
-
-
-
1) Loose /Damaged Connections.
2) Faulty IGN System (spark plugs, ht cables, connections etc.)
3) Faulty/ Clogged INJECTORS.
4) Low COMPRESSION PRESSURE.
5) Improper VALVE CLEARANCE
6) Improper VALVE TIMING.s
7) Faulty ECT SENSOR.
8) Loose Connector/ Faulty ECU.
1) When misfire
percentage is more
than a calibrated
OBD emission
threshold
ON
OFF
Special
Case
2)When the misfire
percentage e is
more than the
catalyst damaging
index
ON
Blinking
OFF
Special
Case
P0302
Cylinder 2 Misfire
Mis-fire fault,
cylinder 1
-
-
-
1) Loose /Damaged Connections.
2) Faulty IGN System (spark plugs, ht cables, connections etc.)
3) Faulty/ Clogged INJECTORS.
4) Low COMPRESSION PRESSURE.
5) Improper VALVE CLEARANCE
6) Improper VALVE TIMING.s
7) Faulty ECT SENSOR.
8) Loose Connector/ Faulty ECU.
1) When misfire
percentage is more
than a calibrated
OBD emission
threshold
ON
Blinking
OFF
Special
Case
2)When the misfire
percentage is more
than the catalyst
damaging index
ON
Blinking
OFF
Special
Case