P0117 on Volvo
Engine Coolant Temperature Sensor Circuit Low
P0117 on Volvo vehicles indicates engine coolant temperature sensor circuit low. Au7o has documented this code across 1 Volvo model — most commonly on V90 Cross Country. This code means the engine coolant temperature (ECT) sensor is reading too low a voltage, which the computer interprets as an impossibly high coolant temperature. In most cases this is an electrical fault — such as a short to ground in the wiring — rather than the engine actually overheating. The coolant temperature signal affects fuel mixture, cooling fans, and other functions, so a bad reading can cause poor running, hard starting, or fans running constantly. The fault is usually in the sensor or its wiring. Typical repair costs on Volvo range from $200 to $800, depending on the specific model and root cause.
Common Causes of P0117
- •Faulty engine coolant temperature sensor
- •Short to ground in the sensor signal wire
- •Damaged or corroded wiring/connector at the sensor
- •Coolant contamination affecting the sensor
- •Poor electrical ground
- •Faulty PCM/ECM (less common)
P0117 on Volvo by Model
Volvo V90 Cross Country(1 issue)
- T6 Turbocharger Coolant Line Crack and Leak2017-2022
The T6 twin-charged (supercharged + turbocharged) 2.0L 4-cylinder develops cracks in the turbocharger coolant supply and return lines. The plastic quick-connect fittings and the rigid coolant lines become brittle from heat cycling in the confined engine bay. A cracked line causes coolant loss that can lead to turbo damage from overheating. The leak is often small and difficult to locate visually because it evaporates on the hot turbo housing.
Looking for P0117 on a different make?
View P0117 across all makes →Frequently Asked Questions
What does P0117 mean on Volvo?▼
P0117 stands for "Engine Coolant Temperature Sensor Circuit Low." This code means the engine coolant temperature (ECT) sensor is reading too low a voltage, which the computer interprets as an impossibly high coolant temperature. In most cases this is an electrical fault — such as a short to ground in the wiring — rather than the engine actually overheating. The coolant temperature signal affects fuel mixture, cooling fans, and other functions, so a bad reading can cause poor running, hard starting, or fans running constantly. The fault is usually in the sensor or its wiring. On Volvo specifically, this code is documented across 1 model.
What causes P0117 on Volvo vehicles?▼
Common causes on Volvo: Faulty engine coolant temperature sensor, Short to ground in the sensor signal wire, Damaged or corroded wiring/connector at the sensor, Coolant contamination affecting the sensor, Poor electrical ground. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0117 on a Volvo?▼
Repair costs on Volvo range from $200 to $800, depending on the specific model and root cause.
Which Volvo models have P0117 documented?▼
Au7o has documented P0117 on 1 Volvo model: V90 Cross Country.