C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

How to Clear Code 42 - 90 L98

Thread Tools
 
Search this Thread
 
Old Jul 21, 2005 | 11:14 PM
  #1  
90Indy's Avatar
90Indy
Thread Starter
Pro
10 Year Member
 
Joined: Jan 2004
Posts: 503
Likes: 0
From: Forney Texas
Default How to Clear Code 42 - 90 L98

As the title states I need to clear code 42 on my 90 L98. I used an AutoXray Scanner to find out the car threw a code. My scanner would not clear the code so I don't know what to try next. Please give me the solution.

I also have a thread running in the Tech Section titled "Mods Complete - Engine Dead - Help". I would greatly appreciate it if you have not read my thread please do so. I need help fast with this situation as my wife and I have plans to take this car on a trip next week to celebrate our anniversery.

I thank you in advance for your help.

90Indy
Reply
Old Jul 22, 2005 | 02:25 AM
  #2  
Morley's Avatar
Morley
Drifting
 
Joined: Mar 2005
Posts: 1,923
Likes: 0
From: GA
Default

Disconnect the battery for 5 minutes.
Reply
Old Jul 22, 2005 | 07:51 AM
  #3  
90Indy's Avatar
90Indy
Thread Starter
Pro
10 Year Member
 
Joined: Jan 2004
Posts: 503
Likes: 0
From: Forney Texas
Default

Thanks Morley, will do.

90Indy
Reply
Old Jul 23, 2005 | 02:15 PM
  #4  
90Indy's Avatar
90Indy
Thread Starter
Pro
10 Year Member
 
Joined: Jan 2004
Posts: 503
Likes: 0
From: Forney Texas
Default

I left the battery disconnected overnight and when I scanned it to see if the code had cleared, it had not. Any ideas as to what this could mean? I also have a thread running in the Tech Sect. about my ignition system not producing any spark. Could the two be connected?

All help appreciated.

90Indy
Reply
Old Jul 23, 2005 | 05:29 PM
  #5  
Morley's Avatar
Morley
Drifting
 
Joined: Mar 2005
Posts: 1,923
Likes: 0
From: GA
Default

Originally Posted by 90Indy
I left the battery disconnected overnight and when I scanned it to see if the code had cleared, it had not. Any ideas as to what this could mean? I also have a thread running in the Tech Sect. about my ignition system not producing any spark. Could the two be connected?

All help appreciated.

90Indy
Code 42 and no spark are definately related.

Code 42- This code will be set when the engine is running at 600 rpm or greater, and there is no pulse on the white wire from the ecm to the ignition module for more than 200ms (milliseconds). Common causes for this code include bad connections, frayed wiring, or broken wires such as the tan/black (ecm pin D5) purple/white( ecm pin B5) or white wire (ecm pin D4). Check your wiring carefully along with the connections back to the ecm.
Reply

Get notified of new replies

To How to Clear Code 42 - 90 L98





All times are GMT -4. The time now is 10:26 PM.

story-0
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-1
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-2
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-3
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-4
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-5
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-6
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-7
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-8
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-9
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE