Skip Shift 1-4 Upshift Lamp Control Circuit
Table of contents
P1664 BUICK Possible Causes
- Faulty Up-Shift driver
- Up-Shift driver harness is open or shorted
- Up-Shift driver circuit poor electrical connection
How do I fix code P1664 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 P1664 BUICK code
The cost of diagnosing the P1664 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)
P1664 BUICK Description
With the engine speed over 600 rpm, the Powertrain Control Module (PCM) detects the commanded state of the Up-Shift driver and the Actual state of the control circuit did not match, all conditions met for over 5 seconds.