P0329: Knock Sensor 1 Circuit Input Intermittent (Bank 2 or Single Sensor)
MediumPowertrainIgnition System
What does P0329 mean?
P0329 is a diagnostic trouble code indicating "Knock Sensor 1 Circuit Input Intermittent (Bank 2 or Single Sensor)". A sensor in the ignition system is reporting abnormal data or has lost communication with the ECU. Sensors can fail due to age, contamination, heat exposure, or wiring issues.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Intermittent warning lights
- Erratic gauge readings
Estimated repair cost
Typical range in Australia (parts + labour)
$100 – $500 AUD
Common causes
- Faulty ignition system component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
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Code P0329 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.