P0117 on a Volvo: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

Safe to drive, but the engine may run rich and the cooling fans may stay on until the sensor circuit is repaired.

What P0117 means on a Volvo

On a Volvo, P0117 means the engine coolant temperature (ECT) sensor is sending a low-voltage signal that the computer reads as the engine being very hot. The sensor is typically mounted near the thermostat or in the engine block, and a shorted sensor or wiring is the usual cause. While the code is active, the computer may add fuel and keep the fans running.

Is P0117 common on Volvos?

P0117 appears most often on higher-mileage S60, XC60, and XC90 models. Small coolant leaks that soak the sensor connector and aging wiring are common contributors on Volvos, so check the connector for green corrosion before replacing parts.

Commonly reported on: S60, XC60, XC90, V60.

Symptoms

Check engine light on
Cooling fans running constantly
Poor fuel economy
Temperature gauge reading high with a cool engine

Common causes

most common: Faulty coolant temperature sensor
common: Sensor signal wire shorted to ground
common: Corroded connector from a coolant leak
less common: Wiring damaged by heat or rubbing

How to fix it

Fix	DIY?	Typical cost
Replace the coolant temperature sensor	Yes	$30–80
Repair the sensor wiring or connector	Mechanic	$80–200
Have a shop diagnose the circuit	Mechanic	$100–150

Frequently asked questions

Can I drive my Volvo with a P0117 code?

Yes. The code means the sensor reads hot, not that the engine is overheating. Confirm the real coolant temperature and fix the sensor soon.

Why does P0117 happen on Volvos?

A shorted or failed coolant temperature sensor is the most common cause, and a coolant leak that corrodes the connector is also common on older models.

How much does it cost to fix P0117 on a Volvo?

A replacement sensor is about $30 to $80, plus labor if a shop does it. Wiring repairs run about $80 to $200.