What does P1919 mean on a Ford?

P1919. Engine Coolant Temperature Signal Fault. Applies to F-150, Explorer, Ranger, Mustang.

What causes P1919 on a Ford?

Failing ECT sensor with erratic signal Intermittent ECT wiring Corroded sensor connector Air pocket around the sensor PCM input fault

How do I fix P1919 on a Ford?

Bleed air from the cooling system Graph the ECT signal for dropouts Inspect wiring and connector Compare to a thermometer reading Replace the sensor if erratic

Code

P1919

Engine Coolant Temperature Signal Fault

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: F-150, Explorer, Ranger, Mustang
Related: P0118 Engine Coolant Temperature Circuit High Input on OBD Codes List

Findings, check these first

Failing ECT sensor with erratic signal
Intermittent ECT wiring
Corroded sensor connector
Air pocket around the sensor
PCM input fault

Standard procedure

Bleed air from the cooling system
Graph the ECT signal for dropouts
Inspect wiring and connector
Compare to a thermometer reading
Replace the sensor if erratic

Code lookup

Type a code above, or start from a symptom or a common code.

Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.

Sources and review

Review: checked against the recorded source material.

OBDII.pro: P1919 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1919: ENGINE COOLANT TEMPERATURE SIGNAL
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
P1919 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1919: Engine Coolant Temperature Signal
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.

Last updated 2026-09-06.

Report a correction for P1919. Include your vehicle, the issue and a source if you have one.