P1116 Code - Engine Coolant Temperature Sensor Out of Self-Test Range
Quick Answer
The Engine Coolant Temperature (ECT) Sensor is a thermistor device in which resistance changes with temperature. Common causes include Low Engine Coolant Level, Faulty Engine Coolant Temperature (ECT) sensor, Engine Coolant Temperature (ECT) sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1116 indicates Engine Coolant Temperature Sensor Out of Self-Test Range.
- Common causes
- Common causes include Low Engine Coolant Level, Faulty Engine Coolant Temperature (ECT) sensor, Engine Coolant Temperature (ECT) sensor harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1116 Description
Thermistor-type sensors are considered passive sensors. A passive sensor is connected to a voltage divider network so varying the resistance of the passive sensor causes a variation in total current flow. Voltage that is dropped across a fixed resistor (pull-up resister) in series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor.
The ECT measures the temperature of the engine coolant. The PCM uses the ECT input for fuel control and for cooling fan control. There are 3 types of ECT sensors; threaded, push-in, and twist-lock. The ECT sensor is located in an engine coolant passage.
What are the Possible Causes of the DTC P1116?
- Low Engine Coolant Level
- Faulty Engine Coolant Temperature (ECT) sensor
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
- Faulty Engine Coolant Thermostat
- Damaged Powertrain Control Module (PCM)
How to Fix the DTC P1116?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1116 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P1116 Acura — Engine Coolant Temperature Sensor Performance Problem
- P1116 Audi — HO2S Sensor Heater Circuit Open Bank 1 Sensor 1
- P1116 BMW — Mass Or Volume Air Flow Circuit Range/Performance Problem Bank 2
- P1116 Buick — Engine Coolant Temperature Sensor Signal Unstable Or Intermittent
- P1116 Cadillac — Engine Coolant Temperature Sensor Signal Unstable Or Intermittent
- P1116 Chevrolet — Engine Coolant Temperature Sensor Signal Unstable Or Intermittent
- P1116 Ford — Engine Coolant Temperature Sensor is Out of Self-Test Range
- P1116 GMC — Engine Coolant Temperature Sensor Signal Unstable Or Intermittent
- P1116 Honda — Engine Coolant Temperature Sensor Performance Problem
- P1116 Hyundai — Boost Pressure Sensor Malfunction
- P1116 Lexus — Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
- P1116 Lincoln — Engine Coolant Temperature Sensor is Out of Self-Test Range
- P1116 Mazda — Engine Coolant Temperature Sensor is Out of Self-Test Range
- P1116 Mercury — Engine Coolant Temperature Sensor is Out of Self-Test Range
- P1116 MINI — Mass Or Volume Air Flow Circuit Range/Performance Problem Bank 2
- P1116 Scion — Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
- P1116 Subaru — Engine Torque Control Cut Signal Circuit Low Input
- P1116 Suzuki — Engine Coolant Temperature Circuit Performance At Engine Soaking
- P1116 Toyota — Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
- P1116 Volkswagen — HO2S Sensor Heater Circuit Open Bank 1 Sensor 1
Frequently Asked Questions about P1116 Code
1. What are the common symptoms of OBDII code P1116?
The common symptoms of OBDII code P1116 include erratic engine temperature readings, engine overheating, poor fuel efficiency, and potential stalling or rough idling.
2. What can cause the OBDII code P1116 to trigger?
The OBDII code P1116, indicating an Engine Coolant Temperature Sensor Out of Self-Test Range, can be triggered by a faulty engine coolant temperature sensor, wiring issues, or a malfunction in the engine control module.
3. How can I diagnose the cause of OBDII code P1116?
To diagnose the cause of OBDII code P1116, you can start by checking the engine coolant temperature sensor for proper operation, inspecting the wiring for any damage, and using a scan tool to monitor the sensor readings.
4. Can a faulty engine coolant temperature sensor be repaired or does it need to be replaced?
In most cases, a faulty engine coolant temperature sensor that triggers OBDII code P1116 will need to be replaced. Repairing the sensor is not recommended due to its critical role in the engine's performance and emissions control.
5. What are some repair tips for resolving OBDII code P1116?
Repair tips for addressing OBDII code P1116 include checking and replacing the engine coolant temperature sensor, ensuring proper wiring connections, clearing the fault code, and performing a test drive to verify the issue has been resolved.
6. Is it safe to continue driving with OBDII code P1116 present?
It is not recommended to continue driving with OBDII code P1116 present, as it can lead to engine overheating, poor performance, and potential damage to engine components. It is best to address the issue promptly.
7. Can OBDII code P1116 be triggered by a low coolant level?
While a low coolant level can potentially impact the engine's temperature readings, it is not a direct cause of OBDII code P1116. However, maintaining proper coolant levels is essential for overall engine health.
8. How long does it take to repair OBDII code P1116?
The time it takes to repair OBDII code P1116 can vary depending on the exact cause of the issue and the expertise of the person performing the repair. In general, it can take anywhere from 30 minutes to a few hours to diagnose and resolve the problem.
9. Can OBDII code P1116 be a recurring issue after repair?
If the root cause of OBDII code P1116, such as a faulty engine coolant temperature sensor, is not properly addressed during the repair, it can lead to a recurring issue. It is essential to diagnose the problem accurately and ensure a thorough repair to prevent recurrence.
10. Are there any preventive maintenance measures to avoid OBDII code P1116?
Regularly scheduled maintenance, such as checking coolant levels, inspecting the engine coolant temperature sensor, and addressing any wiring issues promptly, can help prevent OBDII code P1116 and other related engine performance problems.
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