Engine Coolant Temperature Gauge Malfunctioning
WARNING: This page is about a different car, the 1997 Oldsmobile Cutlass and 1997 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
- Using scan tool, monitor PCM. If engine coolant temperature signal is correct, go to next step. If engine coolant temperature signal is incorrect, see appropriate BASIC TESTING article in ENGINE PERFORMANCE section.
- Using scan tool, monitor BFC SPI serial data bus. If engine coolant temperature signal is correct, replace instrument cluster. See INSTRUMENT PANEL article. If engine coolant temperature signal is incorrect, replace BFC. See REMOVAL & INSTALLATION .