Powertrain
generic / SAE
P0327
Knock Sensor 1 Circuit Low Input (Bank 1)
The knock sensor signal voltage is below the expected range. Usually points to a piezoelectric sensor that has lost its output, or a short to ground in the signal line.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / 27
Possible causes
- Knock sensor failed high
- Signal wire shorted to ground medium
- Connector pins corroded - high contact resistance low
Symptoms
- Check engine light on
- Power loss from defensive spark retard
- Increased fuel consumption
- Possible audible pinging under load
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–800 €
- Estimated time: 1.5–6 h
- Component: knock sensor
- Component: knock sensor wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012