Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Chevy

The old code 43 will not clear, replaced the knock sensor…

Customer Question
The old code 43...

The old code 43 will not clear, replaced the knock sensor reset the computer 1993 5.7.

Mechanic's Assistant: Have you seen this code before? Have you tried a hard reset?

Not really ,,,what is a hard reset? i disconnected the neg.

Mechanic's Assistant: What is the model of your '93 Chevy?

Silverado k1500

Mechanic's Assistant: Are you fixing your Silverado yourself? What have you tried so far?

Yes, set timing, replaced the K.S, oil antifreeze

Submitted: 2 months ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 7 minutes by:
12/19/2017
Chevy Mechanic: Pete, Auto Service Technician replied 2 months ago
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 31,008
Experience: 14 years GM dealer Technician.
Verified

Hi, my name is ***** ***** I will be happy to assist with this today.In some cases, I may need more info to assist better.I apologize for any delay.

Since the knock sensor was replaced this issue can be due to a faulty PCM/ECM or wiring between the sensor and PCM/ECM.Below are the diagnostic procedure and diagram that needs to be followed to pinpoint which is the cause needing to be repaired or replaced.

https://www.dropbox.com/s/3j3r3ytg7x9i2sb/k-12-19.png?dl=0

https://www.dropbox.com/s/3ko0tqyodb2dm35/kn-12-19.png?dl=0

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service, your 5-star rating is appreciated ( should be a link to click on here or above).You can rate at any time and we can continue to work on your question as this will not close out your question.I work on delivering the best answer and help here but in some cases, it can be difficult to do without seeing the vehicle.

Thanks Pete

Ask Your Own Chevy Question
Chevy Mechanic: Pete, Auto Service Technician replied 1 month ago

Hi, just checking in to see how things are going. Do you need further assistance?

Ask Your Own Chevy Question
Ask Pete Your Own Question
Pete
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 31,008
31,008 Satisfied Customers
Experience: 14 years GM dealer Technician.

Pete is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,289 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,357 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,866 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,918 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,734 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
I have an 06 GMC Sierra 5.3L. Just put both knock sensors on
I have an 06 GMC Sierra 5.3L. Just put both knock sensors on it with a new harness and the updated intake gaskets and now the engine started but it never smooths out like it was before the repair and … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
3 days ago replaced knock sensors and harness and o2 sensors
3 days ago replaced knock sensors and harness and o2 sensors knock sensor codes still there. now at about 2500 rpm cel flashes and po 300 is stored long term fuel trim goes to +55 percent on bank 2 an… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,631 satisfied customers
The old code 43 will not clear, replaced the knock sensor
the old code 43 will not clear, replaced the knock sensor reset the computer 1993 5.7. … read more
Pete
Pete
Auto Service Technician
31,008 satisfied customers
OBD code P0330 Knock Sensor Bank 2. I've been googleing for
OBD code P0330 Knock Sensor Bank 2. I've been googleing for over a half hour trying to find the location. Can you help. 2012 Traverse 3.6L. … read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,270 satisfied customers
I installed new knock sensors buy the code is there.
i installed new knock sensors buy the code is there … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
229 satisfied customers
We paid over $1,000 to replace (3) knock sensors on our 2014
We paid over $1,000 to replace (3) knock sensors on our 2014 2500HD Duramax Diesel truck and still have the same problem with the Stabilitrak and DEF error messages. We have currently 91 miles left to… read more
Pete
Pete
Auto Service Technician
31,008 satisfied customers
Chevy 2001 Silverado 4.3 L. I replaced the knock sensor and
Chevy 2001 Silverado 4.3 L. I replaced the knock sensor and the "secondary air" and "evap" codes went away. Now getting "heater 02" and "catalytic converter" codes after driving 100 miles. Is there an… read more
roy
roy
Associate Degree
3 satisfied customers
Locked out, having problems with the knock sensors had to
having problems with the knock sensors had to erase codes to get home , now im locked out of the computer … read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
298 satisfied customers
I have a 2008 Chevy Cheyenne 5.3 L with a knock sensor code
I have a 2008 Chevy Cheyenne 5.3 L with a knock sensor code the intake is removed and the conventional picture does not match what I have truck is made in Mexico California emission standards… read more
Don - Mo Lurch
Don - Mo Lurch
Auto Mech / Electronics
Vocational, Technical or Trade Scho
2,918 satisfied customers
Knock sensor on bank 2, catalytic converter on bank 2 codes
knock sensor on bank 2, catalytic converter on bank 2 codes on 4.3 liter 2011express van … read more
Ron Z.
Ron Z.
- Chevy Tech -
Vocational, Technical or Trade Scho
2,734 satisfied customers
2002 tahoe 5.3, no 5V dc at the knock sensor plug in [pin 11
2002 tahoe 5.3, no 5V dc at the knock sensor plug in [pin 11 and 51] wires OK to PCM, with key on...where does the 5V originate from? any out side source or fused, switched before entering PCM? … read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,270 satisfied customers
The engine knock sensor in front of engine. is there suppose
the engine knock sensor in front of engine. is there suppose to be a wire to connect it? I replaced the sensor and the engine light is still on. its a 2005 impala … read more
Gunvir Singh
Gunvir Singh
1,871 satisfied customers
Will a bad knock sensor cause the cam sensor to act up on a
Will a bad knock sensor cause the cam sensor to act up on a '97 chevy 5.7 … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,592 satisfied customers
Question 6 days ago about knock sensors, mechanic has
mechanic has changed knock sensors 2x also wires check motor light still coming on he said meter is showing low voltage on knock sensors … read more
Pete
Pete
Auto Service Technician
31,008 satisfied customers
2003 Chevy Silverado 5.3 showing knock sensor #2 short or
2003 Chevy Silverado 5.3 showing knock sensor #2 short or open, I have replaced both knock sensors and wire harness. Light was off about 3 days now back on same code?… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,631 satisfied customers
2000 chevy 1500 5.3l. Knock sensor code replaced 2 days
2000 chevy 1500 5.3l. Knock sensor code replaced 2 days later knock sensor code again, 2 weeks later engine lost oil pressure, replaced engine with one out of running 2000 GMC 1500 with 73,000 miles w… read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
I just replaced knock sensors and the harness and now when I
I just replaced knock sensors and the harness and now when I sit at idle my voltage drops down to around 12v but then picks back up to 14v within seconds most of the time. Also the check engine light … read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
75 satisfied customers
Knock sensor is going out, need to replace them how much
knock sensor is going out, need to replace them how much would a dealer charge to do it … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x