garajizOBD-II code · manufacturer-specific
P1891
Engine Coolant Level Switch Circuit Failure
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does P1891 mean?
P1891 is defined as “Engine Coolant Level Switch Circuit Failure”.
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: Throttle Position Sensor PWM Signal Low
- Ford, Lincoln, Mercury: Transmission Transfer Case Contact Plate Ground Return Open Circuit
Related codes
- P1890Engine Coolant Level Switch Circuit Short to Ground
- P18892-5-R downshift PWM valve pressure too low transmission slipping
- P1893Engine Torque Signal Low Voltage
- P18881-4 or 2-5 shift slide valve jamming in basic position, shift valve pressure too low
- P1894Engine Torque Signal High Voltage
- P1887TCC Release Switch Circuit
Look up another code
This page is general information; an exact diagnosis needs measurements and a technician’s check.