garajizOBD-II code · manufacturer-specific
P1803
Coolant Temperature Circuit Malfunction
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does P1803 mean?
P1803 is defined as “Coolant Temperature Circuit 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.
- Kia: Immobilizer ECU Signal Error
- Citroen, Diğer, Peugeot: Transmission Clutch Interlock Safety Switch Short Circuit To Ground
Look up another code
This page is general information; an exact diagnosis needs measurements and a technician’s check.