P0116 on Citroen
Engine Coolant Temperature Sensor 1 Circuit Range/Performance
P0116 on Citroen vehicles indicates engine coolant temperature sensor 1 circuit range/performance. Au7o has documented this code across 1 Citroen model — most commonly on DS3. P0116 means the engine control module detected an engine coolant temperature (ECT) sensor reading that is within wiring limits but doesn't make sense — for example, it doesn't rise as the engine warms up, or it disagrees with other temperature data. The ECT sensor reports coolant temperature, which the computer uses for fuel mixture, ignition timing, cooling-fan control, and emissions monitors. An implausible reading can cause poor fuel economy, hard cold starts, or failed emissions readiness. It is generally drivable but should be fixed for proper engine management. Typical repair costs on Citroen range from $300 to $700, depending on the specific model and root cause.
Common Causes of P0116
- •Faulty or drifting engine coolant temperature sensor
- •Stuck-open thermostat (engine never reaches normal temp)
- •Low coolant level or air in the cooling system
- •Wiring or connector resistance affecting the signal
- •Sensor reading inconsistent with intake-air temperature at cold start
- •Corroded sensor connector
- •PCM fault (less common)
P0116 on Citroen by Model
Citroen DS3(1 issue)
- Water Pump Failure2010-2019
The DS3 electric water pump fails prematurely, causing coolant circulation loss and engine overheating. The pump impeller can also degrade, reducing flow rate without complete failure. This is a common EP6/THP engine issue.
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View P0116 across all makes →Frequently Asked Questions
What does P0116 mean on Citroen?▼
P0116 stands for "Engine Coolant Temperature Sensor 1 Circuit Range/Performance." P0116 means the engine control module detected an engine coolant temperature (ECT) sensor reading that is within wiring limits but doesn't make sense — for example, it doesn't rise as the engine warms up, or it disagrees with other temperature data. The ECT sensor reports coolant temperature, which the computer uses for fuel mixture, ignition timing, cooling-fan control, and emissions monitors. An implausible reading can cause poor fuel economy, hard cold starts, or failed emissions readiness. It is generally drivable but should be fixed for proper engine management. On Citroen specifically, this code is documented across 1 model.
What causes P0116 on Citroen vehicles?▼
Common causes on Citroen: Faulty or drifting engine coolant temperature sensor, Stuck-open thermostat (engine never reaches normal temp), Low coolant level or air in the cooling system, Wiring or connector resistance affecting the signal, Sensor reading inconsistent with intake-air temperature at cold start. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0116 on a Citroen?▼
Repair costs on Citroen range from $300 to $700, depending on the specific model and root cause.
Which Citroen models have P0116 documented?▼
Au7o has documented P0116 on 1 Citroen model: DS3.