code 43 diagnosis 1990 L98
Thread Starter
Heel & Toe
Joined: Jul 2007
Posts: 15
Likes: 0
code 43 diagnosis 1990 L98
I had my SES light come on. It had 2 codes. 1 being a TPS sensor. Replaced it and that code went away. The 43 code was on, and the car was pinging alot. Replaced the knock sensor. Pinging now gone.
Now I notice an annoying surging while driving. Poor throttle response.
SES light still on always and spitting out code 43. I do not want to mindlessly throw money at this. I read some threads that talk about the ESC module. Where is that located? Any help??
Thanks!
Now I notice an annoying surging while driving. Poor throttle response.
SES light still on always and spitting out code 43. I do not want to mindlessly throw money at this. I read some threads that talk about the ESC module. Where is that located? Any help??
Thanks!
Intermediate
Joined: Sep 2006
Posts: 29
Likes: 0
From: Sayre PA
At this point it would be a good idea to buy the service manual.
There is no separate ESC module on your vette. It went away at the same time as the old style MAF went away.
Are you sure you hooked it back up after you installed a new one? Or if the connection is bad to the sensor, the ECM will read the wrong voltage from the sensor and trip the ESC code. It also checks to see if it is present, by adding some advance during acceleration to see if it knocks. If it doesn't knock, it also sets the error.
Scot
There is no separate ESC module on your vette. It went away at the same time as the old style MAF went away.
Are you sure you hooked it back up after you installed a new one? Or if the connection is bad to the sensor, the ECM will read the wrong voltage from the sensor and trip the ESC code. It also checks to see if it is present, by adding some advance during acceleration to see if it knocks. If it doesn't knock, it also sets the error.
Scot
Burning Brakes
Joined: Feb 2007
Posts: 786
Likes: 6
From: Manassas VA/Flagler Beach FL
St. Jude Donor '13,'19
Isn't code 43 a knock sensor? FSM says check the wires. Mine was kocking and threw a 43 but it didn't last long so i think maybe it was a loose wire as I reset the CEL and it hasn't come back or knocked since.
Thread Starter
Heel & Toe
Joined: Jul 2007
Posts: 15
Likes: 0
I replaced the esc module. Runs a little better. light still on. still has a 200 rpm surge at or below 1500 rpm. I talked to another guy that said the pic up coil could throw a 43. What's a pick up coil? Same as a coil?
I saw on last reply that the computer was reset. How do I do that?
I have disconnected the battery. The code come right back. I had it disconnected about 5 minutes. Thanks for all the suggestions!! This is my first C-4.
I saw on last reply that the computer was reset. How do I do that?
I have disconnected the battery. The code come right back. I had it disconnected about 5 minutes. Thanks for all the suggestions!! This is my first C-4.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Burning Brakes
Joined: Feb 2007
Posts: 786
Likes: 6
From: Manassas VA/Flagler Beach FL
St. Jude Donor '13,'19
I replaced the esc module. Runs a little better. light still on. still has a 200 rpm surge at or below 1500 rpm. I talked to another guy that said the pic up coil could throw a 43. What's a pick up coil? Same as a coil?
I saw on last reply that the computer was reset. How do I do that?
I have disconnected the battery. The code come right back. I had it disconnected about 5 minutes. Thanks for all the suggestions!! This is my first C-4.
I saw on last reply that the computer was reset. How do I do that?
I have disconnected the battery. The code come right back. I had it disconnected about 5 minutes. Thanks for all the suggestions!! This is my first C-4.
If the code came back after disconnecting the battery it means you still have the problem. Try following the wires back from the knock sensor to the ECM as its most likely a short of some kind. Just an educated guess....
Burning Brakes
Joined: Oct 2004
Posts: 1,019
Likes: 1
From: Weymouth Dorset
