garajizOBD-II code · manufacturer-specific
P1635
Internal Vref Malfunction
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Low (1/5)
- Can I keep driving?
- Usually safe to drive
What does P1635 mean?
P1635 is defined as “Internal Vref Malfunction”.
You can usually keep driving, but have it checked soon so a small fault doesn’t become a bigger one.
Manufacturer-specific meanings
The same code can mean something different on some makes.
- Buick, Cadillac, Chevrolet, GM, GMC, Oldsmobile, Saturn: 5 Volt Reference 1 Circuit
- Volkswagen: Data Bus Powertrain Missing Message From Air Condition Control
- BMW: Throttle Valve Adaptation Lower Mechanical Stop Not Adapted
- Citroen, Diğer, Peugeot: Tire / Axle Ratio Out of Acceptable Range
- Ford, Lincoln, Mercury: Tire Axle Ratio Out of Acceptable Range
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This page is general information; an exact diagnosis needs measurements and a technician’s check.