garajizOBD-II code · manufacturer-specific
P1664
1 4 Upshift Lamp Control Circuit
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does P1664 mean?
P1664 is defined as “1 4 Upshift Lamp Control Circuit”.
Drive gently and only as far as you need to; have it checked as soon as possible.
Manufacturer-specific meanings
The same code can mean something different on some makes.
- GM, GMC: 1 4 Upshift Lamp Control Circuit
- Buick, Cadillac, Chevrolet, Oldsmobile, Saturn: 1-4 Upshift Lamp Control Circuit
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This page is general information; an exact diagnosis needs measurements and a technician’s check.