Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

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: 7 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 7 months ago
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 33,024
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 7 months ago

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

Ask Your Own Chevy Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a chevy mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Pete Your Own Question
Pete
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 33,024
33,024 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

15,756 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,642 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 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

2,952 satisfied customers

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

Ron Z.

Ron Z.

- Chevy Tech -

2,834 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
Chevrolet C1500 4x2: Code 43 on my 89 Chevrolet p/u driving
Code 43 on my 89 Chevrolet p/u driving me loco when hot go to accelerate slight ping then it goes into limp mode I got p/u from pop's he had crate 5.7 installed when I got It several years later I not… read more
Mike S.
Mike S.
Vocational, Technical or Trade Scho
7,852 satisfied customers
Chevrolet Suburban 1500: i have a 1994 suburban 5.7 liter code
i have a 1994 suburban 5.7 liter code 43 esc or knock sensor,, replaced ecm and prom ,knock sensor,code still comes right back… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet K1500 4x4 silverado: 94 K1500 350L silverado Auto
94 K1500 350L silverado Auto trans What is the proper method/procedure for reseting/clearing ECM? Disconnect battery, after 30 seconds recconect? Disconnect battery, turn ignition key to "on" position… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet 1500: i have a 95 chev pu wiyh 4.3 trans not down
i have a 95 chev pu wiyh 4.3 trans not down shifting to first gear and starts off in 2 nd took it to a shop and it shows dtc 43 esc module new mtr but don't have timing tab on cover set by ear were is… read more
mechanic110
mechanic110
Auto Technician
Vocational, Technical or Trade Scho
134 satisfied customers
Can a bad ignition andcombination switch cause a emission
can a bad ignition andcombination switch cause a emission coe to come up on a 1988 chev silverado 3500 with a 7.4… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
94 Suburban: timing chain and gears; cap, wires, plugs and rotor
I have a '94 Suburban that backfires and looses power. It backfired and blew the muffler out. It has 220k miles; I changed the timing chain and gears; cap, wires, plugs and rotor; new oxygen sensor. I… read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,884 satisfied customers
bought a 1988 silverado 5.7 liter...runs good..slight miss..it smooths
I just bought a 1988 silverado 5.7 liter. It starts easy and runs good. It has a slight miss a little, but when given gas it smooths out. When driving it it lacks power and seems to have a little dies… read more
Hal
Hal
owner/service tech
Vocational, Technical or Trade Scho
924 satisfied customers
91 chevy camaro: code 43..distributor,ignition module..intermittently
91 chev camaro code 43 changed computer,prom ,distributor,ignition module ,knock sensor, knock sensor pigtail vehicle seems to drop ignition out intermittently off idle about 1750 rpm wiring seems ok… read more
Jim
Jim
Vocational, Technical or Trade Scho
1,486 satisfied customers
silverado 2500: autozone found code po332 (knock sensor..low fuel..sen
04 silverado ce light on. autozone found code PO332 (knock sensor) or (low fuel pres). Where is knock sen on o4 silverado 2500 with 6.0 ? Engine still runs very good with 94,000 miles. Fuel presure ch… read more
Paul M ASE Master
Paul M ASE Master
Automotive College
3,307 satisfied customers
95 chevy: check engine light..a new distributor, cap, rotor, ICM
my 95 chevy k1500 throws a check engine light on when the engine is under load, i hear a rattling sound from the distributor and then the code shows up. i have a new distributor, cap, rotor, ICM, wire… read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,884 satisfied customers
1994 Chevy: Suburban..V..Code 43 Knock Sensor..Sensor replaced
1994 Chevy Silverado Suburban 5.7 V-8 Engine K - Code 43 Knock Sensor - Sensor replaced - error code cleared, then reappeared. What should I do next?… read more
ssnyder
ssnyder
Vocational, Technical or Trade Scho
18 satisfied customers
1990 Chevy: 4wd..module..ESC to ECM reads 10 volts..timing
Code 43 on 1990 Chevy K1500 4wd replaced E.S.C. module knock sensor and tested voltage from ESC to ECM reads 10 volts. Vehicle constanty has knock reading even at idle suspect timing is being retarded… read more
Carfix4you
Carfix4you
Lead Technician
Associate Degree
412 satisfied customers
Blazer: full size..5.7 I pulled a code 43 and replaced the knock..ecm
I have a 1993 full size blazer 5.7 I pulled a code 43 and replaced the knock sensor.But im still coming up with a code 43 any info will help o yeah its also a brand new ecm .… read more
Arench
Arench
President
CT State GED w/ Honors
1 satisfied customers
1993 Chevy: Van..stay running I have a ESC Code coming
I have a 1993 Chevy Van 20 Series and I am having start problems and when it does sometime it will not stay running I have a ESC Code coming up but I have no idea where it is located at can you help m… read more
GM-Frank
GM-Frank
Lead Technician
37 years Automotive Repair Exp.
278 satisfied customers
1989 chevrolet: warms..distributor components..control module..hood
I have a 1989 Chevorlet K1500 with a 5.7 liter. When the motor warms up it starts to act like the fuel is being shut-off. I have replaced distributor components, iac module, fuel filter(had been insta… read more
michael
michael
High School or GED
582 satisfied customers
1989 K1500 Chevrolet with a 5.7L throttle body engine.
1989 K1500 Chevrolet with a 5.7L throttle body engine. Original engine had a skirt broke on the piston. I replaced the complete engine with a factory rebuilt long block 5.7L. However, this replacement… read more
Rmldaytona
Rmldaytona
ASE certified technician
College
1,352 satisfied customers
93 chevy: I replace the knock sensor & ecm & i cant clear code 43
I have a 93 chevy pickup that has a (E.S.C.)problem.I replace the knock sensor & ECM & i can''t clear code 43.… read more
Jerry
Jerry
Service consultant
Vocational, Technical or Trade Scho
13,107 satisfied customers
Chevy Suburban: K1500..service engine light..Electronic..parts store
I have a 1993 K1500 Chevy Suburban. It has a service engine light and the code is Electronic Spark Control. The parts store sold me the Ignition Control Module which I replaced. It is at the bottom of… read more
Virtual Wrench
Virtual Wrench
Owner of LJ Auto Repair 37 years
Associate Degree
14,398 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