garajizOBD-II code · manufacturer-specific
P1634
Internal Voltage Regulator Malfunction
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does P1634 mean?
P1634 is defined as “Internal Voltage Regulator Malfunction”.
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.
- Volkswagen: Accelerator Pedal Position Sensor 2 Signal Too High
- Kia: Alternator B Open 1.8L
- Ford, Lincoln, Mercury: Data Output Link Circuit Failure
- Mazda: Generator Terminal B Circuit Open
- Kia: Generator Terminal Open Circuit
- Buick, Cadillac, Chevrolet, GM, GMC, Oldsmobile, Saturn: Ignition 1 Power Circuit Low Voltage
- BMW: Throttle Valve Adaptation Spring Test Failed
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This page is general information; an exact diagnosis needs measurements and a technician’s check.