E39 / P0327 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Check Engine
Performance loss.
Knock Sensor Cyl. 1-2 Circuit, Short to Ground
Fault symptom
Check Engine
Performance loss.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Engine running more than 10 seconds. |
| Engine speed more than 400 rpm. |
Fault criteria:
| The control module detects the circuit is shorted to ground for more than 5 seconds. |
System reaction to a fault:
| The ignition is lowered to minimise the risk of engine damage. |
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:
| Knock Sensor 1 Circuit Failure |
| (See also description of readings/activations in diagnostic tool) |
