P0116: Engine Coolant Temperature Sensor 1 Circuit Range/Performance
8 vehicles · 7 makes · $30-$2,000 repair
Most Reported On
P0116 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2000-2012 Peugeot 206 (XR, XT), 2012-2026 Renault Clio (Dynamique, Iconic), and 2010-2019 Citroen DS3 (DStyle, DSport, Performance), plus 5 other vehicles, with repair costs ranging from $30 to $2,000.
Common Causes
Typical Repair Cost
Based on 8 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0116, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (8)
FAQ
What does P0116 mean?
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.
What are the most common causes of P0116?
The most common causes of P0116 are: 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). The specific cause varies by vehicle.
How much does it cost to fix P0116?
Repair costs for P0116 range from $30 to $2,000, depending on the vehicle and root cause.
Which vehicles are affected by P0116?
Au7o has documented P0116 across 8 vehicle models from 7 manufacturers: Audi, Citroen, Peugeot, Renault, SEAT, Toyota, Volkswagen.
Sources (11)
- ForumGuide on how to replace a G62 Coolant Temperature Sensor - Audifans.net
- ForumCoolant Sensor, Updated Green, G62 (ELTH-OEM) - JH Motorsports
- ForumSeat Ibiza FR TSI 1.2L - Heating Issue - Water Pump/Head Gasket? | SEATCUPRA.NET
- articleGuide to replacing the thermostat/water pump unit on the 1.4 TSI CZEA engine | SEATCUPRA.NET
- articleVolkswagen 1.4L TSI Maintenance and Inspection Tips (EA211 water pump/thermostat)
- ForumWater Pump/Thermostat Failure - Audi-Sport.net
- articleVolkswagen Golf R Engine Coolant Temperature Sensor: A Complete Guide 2012-2024 (Go-Parts)
- ForumTypical Thermostat housing issue — VWROC (temp gauge accuracy discussion)
- articleVW Golf 7 Water pump and thermostat housing leaks — fault code P00B7 (Autodoc)
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.