Coolant Gauge Circuit Conditions
Table of contents
P1691 BUICK Possible Causes
- Faulty Coolant Gauge
- Coolant Gauge harness is open or shorted
- Coolant Gauge circuit poor electrical connection
How do I fix code P1691 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 P1691 BUICK code
The cost of diagnosing the P1691 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)
P1691 BUICK Description
With the key on, and the Powertrain Control Module (PCM) detects an open, short-to-ground or short-to-voltage condition in the Coolant Gauge Circuit.