Engine Controls - Incorrectly Labeled Code 23 and 23: Overview

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Number: 90-172-6E

Section: 6E

Date: February 1990

Corporate Bulletin No: 016507


Subject:
DRIVEABILITY AND EMISSIONS CODE 23 AND 25


Model and Year:
1990 Jl (GEO TRACKER) WITH 1.6L (VIN CODE U) ENGINE


TO: ALL CHEVROLET DEALERS

This bulletin serves to revise the Code 23 and Code 25 facing page and chart in Section 6E2-A 'Driveability And Emissions' in the 1990 Geo Tracker 1.6L (VIN U) "J" Carline (TBI) Service Manual.

The title blocks on pages 6E2-A-l, 6E2-A-36, 6E2-A-37, 6E2-A-38, and 6E2-A-39 are incorrectly labeled. The malfunction Code 23 and Code 25 (Manifold Air Temperature Sensor Circuit) were reversed. Code 23 was labeled Code 25 and Code 25 was labeled Code 23.

The following pages reflect the correct labeling of the malfunction codes and table of contents page at the beginning of Section 6E2-A.