garajizOBD-II code · manufacturer-specific
P1820
Transmission 4-Wheel Drive Mode Select Short Circuit To Ground
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does P1820 mean?
P1820 is defined as “Transmission 4-Wheel Drive Mode Select Short Circuit To Ground”.
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.
- Buick, Cadillac, Chevrolet, GM, GMC, Oldsmobile, Saturn: Internal Mode Switch Circuit A Low
- Volkswagen: Pressure Control Solenoid 2 Short To B+
- Ford, Lincoln, Mercury: Transmission Transfer Case Clockwise Shift Relay Coil Circuit Failure
Related codes
- P1819Transmission 4-Wheel Drive Mode Select Short Circuit To Battery
- P1821Transmission Neutral Safety Switch Circuit Failure
- P1818Transmission 4-Wheel Drive Mode Select Open Circuit
- P1822Transmission Neutral Safety Switch Open Circuit
- P1817Transmission 4-Wheel Drive Mode Select Circuit Failure
- P1823Transmission Neutral Safety Switch Short Circuit To Battery
Look up another code
This page is general information; an exact diagnosis needs measurements and a technician’s check.