What is your question?
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What is your question?
Looking for temp sender
What makes this problem better or worse?
As engine warms up
How long has your 1991 Buick Century had this problem?
About 1month
2 Replies
Hello, the engine coolant temperature sending unit and engine coolant temperature sensor are both located in approximately the same area - above the water pump pulley area of the front of the engine.
Additionally OBD 1 trouble code 21 is related to the TPS (Throttle Position Sensor) / circuit.. The CTS (Coolant Temperature Sensor) trouble codes are 14 OR 15 .. Your question is about the “coolant temperature sender†would be temperature ‘gauge’ related. A professional scan test while the engine is COLD will make short work of diagnosis!