Engine Controls - False DTC B0423 on Generic Scan Tool

Condition

DTC B0423 Stored in ECM when using Generic Scan Tool
Incorrect Diagnostic Trouble Code may be displayed when using a generic scan tool.

When using a generic scan tool while diagnosing model year 1999 vehicles equipped with a 2.0L engine, an incorrect DTC B0423 may be displayed by itself or along with P1176 (17584).This incorrectly displayed DTC has the same meaning as P1176 (17584) and therefore P1176 (17584) diagnostics should be followed to correctly repair the vehicle.

NOTE:
DO NOT replace the ECM for this condition.





01 07 04 Jan.12, 2007 2014068

Technical Background
The service procedures for DTC P1176 also apply to the condition which results in the storage of DTC B0423.

Production Solution
Vehicle is no longer in production.

Service
The DTC display is incorrect when using a generic scan tool, the OBD monitor for DTC P1176 O2 Correction Behind Catalyst, B1 Limit Attained functions properly.Therefore should you encounter a DTC B0423, follow the diagnostics for DTC P1176

Warranty
Information only.

Required Parts and Tools
No special tools required.

No special parts required.Always see ETKA for the latest part(s) information