P0328
Medium SeverityKnock Sensor 1 Circuit High (Bank 1)
Ignition System
P0328 — Instant Answer
Knock Sensor 1 Circuit High (Bank 1)
Severity: MEDIUM SEVERITY
Meaning: Knock sensor signal is too high. Could be a noisy engine or a sensor fault.
Safe to drive? Usually yes with caution, but confirm root cause before long trips.
Estimated repair cost: $20 - $400
Most common causes:
- 1. Engine mechanical noise being misread (35-45% of cases)
- 2. Faulty sensor (10-25% of cases)
- 3. Short in wiring (10-25% of cases)
Symptoms
- ⚠️Excessive timing retard
- ⚠️Loss of power
- ⚠️Check engine light
Related Symptoms
Common Causes
How to Diagnose P0328
- 1Listen for engine mechanical noises
- 2Check for exhaust leak near sensor
- 3Replace sensor if no mechanical issue found
OEM Procedures for P0328
P0328 affects the Knock Sensor. Found 9 OEM service manual procedures.
Knock Sensor
Knock Sensor - Front Knock Sensor Replacement
Knock Sensor - Front Knock Sensor Replacement
Knock Sensor - Front Knock Sensor Replacement
Knock Sensor - Front Knock Sensor Replacement
Knock Sensor - Front Knock Sensor Replacement
Knock Sensor - Front Knock Sensor Replacement
Knock Sensor - Front Knock Sensor Replacement
Showing 8 of 9 procedures
OEM Diagnostic Flowchart
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Read live data and freeze frame for P0328 to pinpoint the cause before buying parts.
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Parts & Tools for This Job
Common parts shoppers buy for P0328 Knock Sensor 1 Circuit High (Bank 1).
Oxygen Sensor
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Spark Plugs
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Ignition Coils
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Mass Air Flow Sensor
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Fuel Injectors
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Engine Oil
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OBD2 scanner
Read codes and freeze-frame data before you guess at the fault.
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Check SpecificationsBattery tester
Check cranking and charging health before replacing expensive parts.
A weak battery can mimic alternator or starter problems.
Check SpecificationsMultimeter kit
Confirm voltage, continuity, and sensor power with one simple kit.
A meter is the cheapest way to rule out a bad circuit fast.
Check SpecificationsRelated Resources
Repair guides, symptom pages, and wiring diagrams related to P0328.
OEM Manual Evidence
Browse →Engine Control System DTCS — 2013 Acura RDX 3.5L Eng VIN 3 Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >...
Engine Control System - Advanced DTCS — 2013 Acura RDX 3.5L Eng VIN 3 Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimag...
Engine Control System - Advanced DTCS — 2013 Acura RDX 3.5L Eng VIN 4 Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimag...
Engine Control System DTCS — 2013 Acura RDX 3.5L Eng VIN 4 Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >...
Related Symptoms
Browse →Related Codes
The knock sensor on bank 1 has a circuit fault. Without it, the ECM cannot detect engine knock (detonation) and must retard ignition timing for safety.
Knock sensor signal is below expected minimum. Usually an open circuit or failed sensor.
Frequently Asked Questions
- Can an exhaust leak cause P0328?
- Yes — an exhaust leak near the knock sensor can create vibrations that the sensor interprets as knock.
- What if P0328 comes back after replacing the sensor?
- There may be actual engine knock from carbon buildup, low octane fuel, or a mechanical problem causing excessive vibration.
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-11-01