P1493

P1493 00

EVAP System, Fuel Level Sensor Failure and Tank Pressure Sensor Value Too High







Fault symptom
Check Engine

On-board diagnosis

Type of diagnosis:
Once per driving cycle. Stopped when fault criteria are fulfilled or OK reported.

Enable criteria:
Ignition ON.
Crankshaft stationary.
Vehicle speed 0 km/h.
Intake air temperature higher than 0 degree C.
Atmospheric pressure between 75 and 106 kPa.
Tank level lower than 50 litres.
Current tank pressure sensor value is adapted.

Fault criteria:
Adapted value is more than 750 Pa higher than atmospheric pressure.
A fuel level sensor fault has been detected at the same time, which makes the EVAP diagnosis unreliable.

Dependent
None

System reaction to a fault:
None

OK report:
Diagnostics carried out without fault reported.

Fault handling:
Type III
(See Description of On-Board Diagnostics/Fault handling III, "Other emission-related components and functions" for more information.)

Checking the wiring harness
Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help
Fault in connector H42-2 is often a cause of this DTC.