Is it safe to drive with this code?

Short journeys may be possible, but it's not advisable to continue driving indefinitely. The engine may run rich or lean, potentially leading to overheating, poor performance, or catalytic converter damage. If you notice signs of overheating, stop immediately. See our disclaimer for further guidance on vehicle use with faults present.

It may affect your MOT result if the malfunction indicator lamp (MIL) is illuminated at the time of the test. The decision rests with the tester. For full details on emissions and MIL requirements, consult our site disclaimer.

Roughly how much does it cost to fix?

The sensor itself is often in the low two-figure range, and straightforward replacement (including labour at an independent garage) typically falls into the low three-figure band. If additional work is needed—thermostat replacement, wiring repairs, coolant system flushing—costs can rise into the mid three-figure range. Dealer rates and complex diagnostics may push totals higher. Variation depends on vehicle make, parts accessibility, and whether underlying cooling-system faults are present.

Can I just clear the code and keep driving?

Clearing the code will turn off the MIL temporarily, but if the underlying issue remains unresolved the code will typically return. Ignoring it may lead to worsening fuel economy, increased emissions, and potential engine damage over time, so it's best to diagnose and repair the root cause.

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← All fault codes | Electrical & Sensors

P0116

Powertrain

Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance

The engine's temperature sensor circuit is reporting data that falls outside the expected range or changes in a way the control module considers inconsistent with normal engine warm-up.

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ⓘ Information only. This page provides general educational information about fault code P0116. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.

Recommended next steps

Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.

What does P0116 mean?

P0116 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance.

This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

About Electrical & Sensors codes

Codes in the Electrical & Sensors category.

P0116 is one of 4,010 codes in this category. Browse all Electrical & Sensors codes →

What we know about P0116 specifically

We record the SAE J2012 standardised definition and the system this code belongs to, but we have not yet published detailed driver-reported symptoms, common causes, or step-by-step diagnostic guidance for P0116.

Rather than invent that information by generating generic content from a template, we leave it out. For specific guidance, the most reliable sources are:

•your vehicle's own service manual or manufacturer-specific technical bulletins
•a qualified mechanic with a manufacturer-level diagnostic tool
•a marque specialist familiar with your make and model

Codes nearby

Codes adjacent to P0116 in the P-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

P0113 Intake Air Temperature Sensor 1 Circuit High Input

P0114 Intake Air Temperature Sensor 1 Circuit Intermittent

P0115 Engine Coolant Temperature Sensor Circuit Malfunction

P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Input

P0118 Engine Coolant Temperature Sensor Circuit High Input

P0119 Engine Coolant Temperature Sensor Circuit Intermittent

Other Electrical & Sensors codes

Other fault codes in the same system as P0116. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

B1257

Air Temperature External Sensor Circuit Short To Ground Detailed guide

B1363

DBPT Circuit Short To Ground Detailed guide

B2100

Ignition Run/Start Input Circuit Performance Detailed guide

C2000

Steering Angle Sensor Not Calibrated Detailed guide

P0030

HO2S Heater Control Circuit (Bank 1 Sensor 1) Detailed guide

P0031

Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) Detailed guide

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with P0116 can submit a correction or expansion. We review every submission before publishing, mechanic submissions are prioritised.

Information only, not professional advice

The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →

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