P0117 on Dodge
Engine Coolant Temperature Sensor Circuit Low
P0117 on Dodge vehicles indicates engine coolant temperature sensor circuit low. Au7o has documented this code across 1 Dodge model — most commonly on Neon. 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 Dodge range from $800 to $1,500, 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 Dodge by Model
Dodge Neon(1 issue)
- Head Gasket Failure and Coolant Loss1995-2005
The 2.0L engines are prone to head gasket failure, causing external coolant leaks, white exhaust smoke, and eventual overheating. The SOHC engines are more commonly affected than the DOHC variant.
Looking for P0117 on a different make?
View P0117 across all makes →Frequently Asked Questions
What does P0117 mean on Dodge?▼
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 Dodge specifically, this code is documented across 1 model.
What causes P0117 on Dodge vehicles?▼
Common causes on Dodge: 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 Dodge?▼
Repair costs on Dodge range from $800 to $1,500, depending on the specific model and root cause.
Which Dodge models have P0117 documented?▼
Au7o has documented P0117 on 1 Dodge model: Neon.