900 L4-2118cc 2.1L DOHC (1992)
Engine Control Module: Customer Interest
EGR System - MIL ON Intermittently
CATEGORY
Engine
SECTION
2
PAGE
24
ISSUE
10/92-0264
CODE
254
Subject:
EGR System
Application:
900 Turbocharged models with EGR 1990-1992
This PSI was also released in September, 1992 as an Emission Recall (281), applicable only in the State of California. The recommendations herein may
be followed to correct a complaint of intermittent illumination of the Malfunction Indicator Lamp (CHECK ENGINE lamp) related to the EGR system.
This is not a campaign or a service directive.
Under certain operating conditions, such as prolonged deceleration, or very light throttle cruise, exhaust gas temperature may drop below the sensor
threshold for the On-Board Diagnostic monitoring system. The LH Electronic Control Module (ECM) will then light the MIL, falsely indicating that
there is no exhaust gas recirculation (EGR) flow under operating conditions in which there ought to be. Follow the Action below to rectify this
complaint.
Cars Affected:
1990-1992 900 Turbocharged models with EGR
Parts Required
Action:
Remove the EGR system and fit a new LH ECM as follows:
