B. Diagnostic Module, Diagnostic Trouble Code 26: Overview

B. MODEL 140.042/051/057 (MODEL YEAR 1992 CALIFORNIA ONLY) DIAGNOSTIC MODULE, DIAGNOSTIC TROUBLE CODE 26

As of May 1992 production of models 140.042/051 and September 1992 production of model 140.057, a revised diagnostic module is installed in production to avoid unjustified setting of Diagnostic Trouble Code 26 (models 140.042/051/057) and 4/36 (model 140.057).

Effective Serial Number

Model As of Chassis End Number

140.042/051 A-085552

140.057 A-106501


On vehicles manufactured prior to production phase-in, check that vehicle has the proper diagnostic module installed as listed. If not, install the latest diagnostic module according to the list.