P0328 OBD-II Trouble Code: Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0328 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0328 code

P0328 is a diagnostic trouble code (DTC) for "Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0328 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light logo

P0328 code definition

P0328 is a general OBD2 diagnostic trouble code pointing to a fault within the knock sensor 1 circuit.

What the P0328 code means

The P0328 code is telling us that there is a high input from the bank 1 knock sensor 1. The ECU detects excessively high voltage that is out of range of the knock sensor. This leads to the Check Engine Light being displayed on the dashboard.

What causes the P0328 code?

  • Faulty knock sensor 1, bank 1
  • Open or short in knock sensor circuit wiring
  • Failed ECU
  • Wrong octane fuel or lean air fuel ration
  • Engine is overheating
  • Low fuel pressure

What are the symptoms of the P0328 code?

  • The Check Engine Light is the most noticeable symptom of the P0328 code.

  • The engine may exhibit a loss of engine power and some slight hesitation.

  • In some cases the driver may notice a pinging noise at higher RPMs or an engine that is running warmly.

How does a mechanic diagnose the P0328 code?

  • Uses a scan tool hooked up into the DLC port of the vehicle and checks for any codes present along with any freeze frame data associated with the codes

  • Clears the codes and a test drives the vehicle to duplicate the symptoms and code

  • Listens for engine knocking

  • Performs a visual inspection, looking for any faults

  • Checks the cooling system and engine for any faults

  • Check the fuel octane and fuel system if the engine is knocking

  • Uses the scan tool to monitor the knock sensor voltage for changes if engine isn't knocking

  • Uses a scan tool to check the engine coolant temperature and fuel pressures

  • Tests the ECU, each vehicle has it's own testing procedure for the ECU

Common mistakes when diagnosing the P0328 code

Mistakes can be make when steps are not completed in the proper order or are skipped over completely. This can cause a misdiagnosis such as replacing the knock sensor when really the fuel pressure was causing a knock.

How serious is the P0328 code?

The P328 code should not prevent the vehicle from driving to a safe location once the code is triggered. The symptoms are generally rather mild but like any Check Engine Light should be repaired as soon as possible.

With the P0328 code there is the possibility that a mechanic engine issue or that the engine is running hot. If these symptoms are noticed care should be taken when driving.

What repairs can fix the P0328 code?

  • Repairing or replacing the knock sensor wiring harness
  • Replacing bank 1 knock sensor 1
  • Replacing a faulty ECU
  • Repairing fuel issues
  • Repairing an overheating engine

Additional comments for consideration regarding the P0328 code

P0328 can be a difficult code to diagnose if steps are not followed when performing diagnosis. Many different systems can cause the P0328 and simple things can be overlooked if care is not taken.

A professional level scan tool is essential to properly diagnose this code. These scan tools allow technicians to view live data and voltage from sensors as well as check things like the fuel pressure and engine coolant temp which help pinpoint which system the fault lies with.

Need help with a P0328 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
Check Engine Light
P0328

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0328 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,936

Rating Summary
3,597
169
44
25
101
3,597
169
44
25
101

Michael

13 years of experience
379 reviews
Michael
13 years of experience
He was great professional and very knowledgeable
2000 FORD FOCUS - CHECK ENGINE LIGHT IS ON - ATLANTA, GEORGIA

Robert

29 years of experience
179 reviews
Robert
29 years of experience
Robert was on time which is always a plus with me. He found the problem right away and reset the error. He gave me a complete update on all the fluids and brakes . Robert is very easy to talk too !
2002 NISSAN PATHFINDER - CHECK ENGINE LIGHT IS ON - MORGAN HILL, CALIFORNIA

Kenneth

17 years of experience
374 reviews
Kenneth
17 years of experience
Great guy
2013 VOLKSWAGEN JETTA - CHECK ENGINE LIGHT IS ON - LOS ANGELES, CALIFORNIA

Jonathan

10 years of experience
110 reviews
Jonathan
10 years of experience
Jonathan was straight forward with me would recommended him
2007 CHEVROLET MALIBU - CHECK ENGINE LIGHT IS ON INSPECTION - WESTPORT, MASSACHUSETTS

More related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....

Related questions

Q: Check engine light came on, diagnostic was done and came up with codes saying pressure control solenoid 2,3, & 5 are shut off.

Low transmission fluid is a major cause of transmission failures. Your pressure control solenoids turned off to try to prevent damage to transmission components like clutches etc. Unfortunately, the damage is done and changing the fluid will not help, and...

Q: check engine light stays on, replaced the mass air flow sensor

Hello, thank you for writing in. The vehicle will need to be scanned for diagnostic troubleshooting codes. The computer will set a code when issues have been detected. These codes are a way of helping you or the technician to...

Q: P0328 code - 2008 Hyundai Accent

Hello. P0328 is the code for a knock sensor. If the knock sensor fails, or there is an issue with the wiring, the code may be set off. You also mention that the Check Engine Light was not on. If...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com