1446-1447 / 1904
ENGINE
DTC
DESCRIPTION
CAUSE
DIAGNOSTIC
LAMP (
MIL
)
DIAGNOSTIC
LAMP (
CEL
)
Gil When
Driven In CNG
PROBABLE TROUBLE AREA
P1094
Fuel System Leak
detected( Fine
Leak )
Leakage on Low
Pressure side
OFF
ON
(Blinking)
ON
P1095
Fuel System Leak
detected( Large
Leak )
Leakage on High
Pressure side
OFF
ON
(Blinking)
ON
1)Tank Pressure Drops too fast in CNG
2) Faulty Pressure Regulator
3) Faulty or Leaky Injector.
3) Check Tightness of joints between in the High Pressure Line.(near Fuel Gauge, Near Tank valves. Near Connection of Pressure
regulator)
P1096
Fuel System Leak
detected( Fine
Leak )
Leakage on High
Pressure side
OFF
ON
(Blinking)
ON
P1103
Internal Leakage
through Pressure
Regulator Valve
Pressure regulator
valve fault
OFF
ON
ON
1) Blocked fuel line
2) Leaky Pressure regulator
3) Leaky Tank Valves
4) Injector delay time not correct
5) Leaky Injector
P1104
Internal Leakage
through Tank
Valves
Tank valve faulty
OFF
ON
ON
P1105
Tank pressure
sensor Open/
Short Circuit
"Open Circuit
OFF
ON
OFF
1) Loose/ Damaged Connections or Intermittent fault.
2) Sensor supply line Short circuit to Battery/ Ground.
3) Sensor Signal line Short circuit to Battery/ Sensor Supply/Ground.
4) Check the continuity from sensor connector pins to the ECU pins.( ECU pin 109-Sensor pin 1; ECU pin 104-Sensor Pin 2; ECU pin 125-
Sensor pin 3).
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 Pressure sensor.
8) Faulty ECU.
P1106
Rail Temperature
sensor Open/
Short Circuit
Short Circuit
OFF
ON
ON
1) Loose/ Damaged Connections or Intermittent fault.
2) Sensor supply line Short circuit to Battery/ Ground.
3) Sensor Signal line Short circuit to Battery/ Sensor Supply/Ground.
4) Check the continuity from sensor connector pins to the ECU pins.( ECU pin 208-Sensor pin 1; ECU pin 225-Sensor Pin 2; ECU pin 226-
Sensor pin 3 ECU pin 137- Sensor Pin 4).
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 Rail Temperature sensor or resistance in the temperature line.
8) Faulty ECU
P1107
Rail Pressure
Signal Plausibility
Failure
"Open Circuit
OFF
ON
ON