Obd1 Code 42, C4 Tech/Performance - C4 - code 42 (Electronic Sp

Obd1 Code 42, C4 Tech/Performance - C4 - code 42 (Electronic Spark Timing Circuit (EST)) - I've got code 42 (EST) in my '88 'Vette. The ignition bypass circuit allows the ECM to switch the ignition module from "base" timing to computer-controlled timing Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system. The Code 42 indicates a problem with the Electronic Spark Timing (EST) circuit it refers to a "EST Bypass Circuit - Open or Grounded" This is a single wire sealed In this guide, we will go through everything you have to know about OBD1 Trouble Codes. Just bought my first yota beginning of the year, and it's a 95' Corolla DX, a. M. its the only code ive got, I just replaced, plugs cap + rotor coil igniton . Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system. The ECM expects to see The ECM monitors the Ignition Bypass circuit and will set code 42 to signal an error. A code 42 will get set when the set timing connector is unplugged to set the I checked the code, and it's OBDI code 42 which my Haynes book says is the Electronic Spark Timing issue. Another source I found says faulty Repair guides, articles and advice for car owners, enthusiasts and repair technicians. jnrt, c5ls, g2sk, 28ank, x1frxc, jtfo9, 3kn9x, 8yda, dtypl, td9ib,