OBD codes / P0119
P0119
ModerateEngine Coolant Temperature Sensor Circuit Intermittent
P0119 is usually safe to drive with short-term, but the intermittent reading can briefly affect fueling and fans. Keep an eye on the temperature gauge. It's low-risk mechanically; the main task is hunting down the loose or corroded connection.
What this code means
The engine coolant temperature (ECT) sensor signal feeds the computer the engine's temperature. P0119 means that signal is cutting in and out — an intermittent fault. Intermittent codes most often point to a wiring problem: a loose or corroded connector, a chafed wire, or a poor ground that breaks contact as the engine moves and heats up. A failing sensor can also cause it. The intermittent nature can make it tricky to catch, so wiggle-testing the connector and harness while watching the signal is the usual approach.
Symptoms you might notice
- Check-engine light that may come and go
- Temperature gauge that jumps or drops momentarily
- Occasional rich/lean running or fan behavior changes
- Symptoms that appear and disappear with bumps or heat
What it costs to fix
Typical range: $40–$300 · about ~0.3–1.5 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Connector / wiring repair | $10–$120 | ~0.5–1.5 hrs |
| ECT sensor | $15–$80 | ~0.3–1 hrs |
Intermittent faults are usually a cheap connector or wiring fix once found — the time is in tracking down the loose or chafed spot. The sensor itself is inexpensive if it turns out to be the cause.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0119 for my exact vehicle →
Frequently asked
Can I drive with P0119?
Short-term usually yes — watch the temperature gauge to be sure the engine isn't actually overheating. The fault is intermittent, so the car may behave normally most of the time; still, get the loose connection found and fixed.
Why is P0119 intermittent?
Intermittent codes typically mean the signal breaks contact now and then — a loose or corroded connector, a chafed wire, or a poor ground that opens up as things move or heat up. That's why wiring is the first thing to inspect.
Is P0119 the sensor or the wiring?
More often the wiring or connector, given the intermittent nature, though a failing sensor is possible. A wiggle-test of the connector and harness while monitoring the signal usually reveals the culprit.
How much does it cost to fix P0119?
Usually inexpensive — a connector clean or wiring repair, or a cheap sensor. Most of the effort is diagnostic time to locate the intermittent fault.
Seeing P0119 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0119 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.