T8 / P0178 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Ethanol Sensor Circuit, Low Input
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
On-board diagnosis
Type of diagnosis:
Enable criteria:
Fault criteria:
No signal from the sensor. |
System reaction to a fault:
The control module uses "Estimated ethanol content" as a substitute value. |
Checking the wiring harness
Jiggle the wiring harness at several points to detect intermittent breaks or short circuits. Check also the connector for oxidation or loose pins.
Diagnostic help
Diagnosis regards:
Electrical fault in connecting leads or component. |
Functions in the diagnostic tool related to the fault:
• | Measured Ethanol Content |
• | Calculated Ethanol Content |
(See also description of readings/activations in diagnostic tool) |