Low Engine Coolant Circuit Conditions
Table of contents
P1620 BUICK Possible Causes
- Faulty Engine Coolant Switch
- Engine Coolant Switch harness is open or shorted
- Engine Coolant Switch circuit poor electrical connection
How do I fix code P1620 BUICK?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1620 BUICK code
The cost of diagnosing the P1620 BUICK code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1620 BUICK Description
With the engine running, the Powertrain Control Module (PCM) detects that the Engine Coolant Switch signal was low (indicating an open circuit) for 20 seconds