P1328 Code - Cylinder 4 Knock Control Limit Attained
Quick Answer
The OBD-II code P1328 indicates that the knock control system on cylinder 4 has reached its limit. Common causes include Faulty knock sensor on cylinder 4, Carbon buildup in the combustion chamber, Incorrect ignition timing. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P1328 indicates Cylinder 4 Knock Control Limit Attained.
- Common causes
- Common causes include Faulty knock sensor on cylinder 4, Carbon buildup in the combustion chamber, Incorrect ignition timing.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code P1328 Description
The OBD-II code P1328 indicates that the knock control system on cylinder 4 has reached its limit. Knock control is a system designed to prevent engine damage caused by pre-ignition or detonation (also known as knocking) in the combustion chamber. When the knock control limit is attained on cylinder 4, it means that the engine's computer has detected excessive knocking on that specific cylinder, which can lead to decreased performance, reduced fuel efficiency, and potential engine damage if left unresolved.
Common Causes of P1328
- Faulty knock sensor on cylinder 4
- Carbon buildup in the combustion chamber
- Incorrect ignition timing
- Poor quality fuel or fuel with a low octane rating
- Issues with the engine's cooling system
Symptoms of P1328
- Engine misfires or rough idling
- Decreased engine performance or power
- Poor fuel economy
- Illuminated check engine light
- Engine knocking or pinging noises
How to Fix P1328
- Diagnose the specific cause of the knock control limit on cylinder 4 by using a scan tool to read the code and check related components.
- Inspect and potentially replace the knock sensor on cylinder 4.
- Clean carbon deposits from the combustion chamber or perform a fuel system cleaning.
- Adjust the ignition timing to the manufacturer's specifications.
- Ensure the engine cooling system is functioning properly and address any issues if necessary.
Cost to Fix P1328
The repair costs for addressing a P1328 code can vary depending on the specific cause of the issue. On average, the cost of replacing a knock sensor can range from $150 to $300, while cleaning carbon deposits or adjusting ignition timing may cost between $100 to $200. Additional costs for diagnostic time and labor rates can also impact the overall repair bill. It's recommended to consult with a qualified mechanic for a more accurate estimate based on the vehicle's make and model.
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Code P1328 Information for Specific Makes
- P1328 Audi — Cylinder 4 Knock Control Limit Attained
- P1328 BMW — Knock Sensor 2 High Input
- P1328 MINI — Knock Sensor 2 High Input
- P1328 Volkswagen — Cylinder 4 Knock Control Limit Attained
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