Diagnostic Aids

WARNING: This page is about a different car, the 1988 Buick Riviera and 1988 Buick Reatta. However, it is still accessible from the selected car via links, so may be relevant.

Code 61 is designed to indicate situations where the signal through low pressure/low fluid warning loop is not present. Code 61 DOES NOT set if low fluid or low pressure is detected. Normal cause of a Code 61 is a short to voltage of one of the loop circuits, or a shorted ABS diode, located under dash left of steering column.

Fig 1: Low Fluid/Pressure Loop Input Schematic

Fig 2: Flow Chart A15, Code 61 - Low Fluid/Pressure Loop Input Not Processable

Fig 3: Chart A15, Code 61 - Low Fluid/Pressure Loop - Input Not Processable