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Test Description

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

  1. 1:  This step will diagnose a malfunction in the serial data circuits.
DTC P1381

Step Action Yes No
1  Did you perform the Diagnostic System Check-Engine Controls? Go to Diagnostic System Check - ABS in Anti-lock Brake System Go to Diagnostic Starting Point - Engine Controls
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