Diagnostic Aids
WARNING: This page is about a different car, the 2002 Buick Regal, 2002 Buick Century, 2001 Buick Regal, and 2001 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
Check shift linkage for proper adjustment. Inspect wiring for poor connections at PCM, transaxle in-line 20-way connector and TFP manual valve position switch. Check for bent, backed out or damaged terminals, or poor terminal tension. Check for chafed wire or broken wire inside insulation. Check for moisture and corrosion in wiring and connections. When diagnosing intermittent condition, wiggle wiring harness while watching scan tool for change in value. If transaxle overhaul has been performed, ensure fluid level is correct. Low fluid level may set this DTC. Inspect TFP manual valve position switch seals for damage. Inspect TFP manual valve position switch for loose rivets or debris.