P0117 – Engine Coolant Temperature Circuit Low Input
Introduction
Let’s break down exactly what the P0117 trouble code means for your Geely and how to fix it. The P0117 error is often linked to issues with the engine coolant temperature circuit, which may be associated with faulty sensors, wiring problems, or other related components. When diagnosing the P0117 code, it’s essential to consider the entire engine management system, including the coolant temperature sensor, engine control module (ECM), and other related systems like the fuel injection system.
The **P0117 error** is typically caused by a faulty engine coolant temperature sensor or wiring issues, resulting in a **low severity level**. However, it’s crucial to address this issue to avoid potential engine damage, and the **urgency of repair** is medium, as it may not cause immediate harm but can lead to decreased engine performance and fuel efficiency over time.
What does code P0117 mean
The P0117 trouble code indicates a low input from the engine coolant temperature circuit, which can affect the engine’s performance, fuel efficiency, and overall operation. This code is related to the engine management system, specifically the coolant temperature sensor, which plays a critical role in monitoring the engine’s temperature and adjusting the fuel injection and ignition timing accordingly.
Common Geely models affected
The P0117 error can affect various Geely models, including:
- Geely GC2
- Geely GC5
- Geely CK
- Geely MK
- Geely Emgrand EC7
Symptoms table
The following symptoms may be associated with the P0117 trouble code:
| Symptom | Frequency of Occurrence |
|---|---|
| Decreased engine performance | High |
| Increased fuel consumption | Medium |
| Engine stalling or hesitation | Individual |
| Check Engine Light illumination | High |
| Engine overheating | Low |
| Difficulty starting the engine | Medium |
Causes table
The following potential causes may be associated with the P0117 trouble code:
| Potential Cause | Probability |
|---|---|
| Faulty engine coolant temperature sensor | High |
| Wiring issues or corrosion | Medium |
| ECM software issues | Low |
| Low engine coolant level | Medium |
| Blockages in the cooling system | Low |
Real-world driving scenarios
When driving with the P0117 trouble code, you may experience decreased engine performance, particularly during cold starts or when driving in extreme temperatures. The engine may also stall or hesitate, and fuel consumption may increase. In some cases, the engine may overheat, which can cause further damage.
Diagnostic steps
To diagnose the P0117 code, follow these steps:
1. Inspect the engine coolant temperature sensor and wiring for any signs of damage or corrosion.
2. Use a scan tool to monitor the engine coolant temperature reading and compare it to the expected value.
3. Check the wiring and connections between the sensor and the ECM.
4. Perform a visual inspection of the cooling system to ensure it’s functioning properly.
Common diagnostic mistakes
When diagnosing the P0117 code, be aware of the following common mistakes:
1. Failing to inspect the wiring and connections.
2. Not considering other related systems, such as the fuel injection system.
3. Replacing the sensor without checking the wiring and connections.
4. Not using a scan tool to monitor the engine coolant temperature reading.
5. Not consulting the repair manual or manufacturer’s instructions.
When not to replace the sensor
Do not replace the engine coolant temperature sensor if:
1. The wiring or connections are damaged or corroded.
2. The ECM software is outdated or faulty.
3. There are blockages in the cooling system.
4. The low engine coolant level is not addressed.
How to fix
To fix the P0117 code, follow these steps:
1. Inspect and repair any wiring or connection issues.
2. Replace the engine coolant temperature sensor if necessary.
3. Update the ECM software if required.
4. Address any cooling system issues, such as blockages or low coolant levels.
Severity level
The P0117 trouble code has a **medium severity level**, as it can cause decreased engine performance and fuel efficiency. However, it’s essential to address this issue to avoid potential engine damage. The **driving risk** is medium, as the engine may stall or overheat, and the **urgency of repair** is medium, as it should be addressed soon to avoid further damage.
Is it safe to drive with this code
While it’s possible to drive with the P0117 code, it’s not recommended, as it can cause decreased engine performance, increased fuel consumption, and potential engine damage. If you must drive, be aware of the engine temperature and watch for any signs of overheating.
Estimated repair cost
The estimated repair cost for the P0117 code can range from $200 to $500, depending on the severity of the issue and the labor costs.
Preventive maintenance tips
To prevent the P0117 code, ensure regular maintenance of the cooling system, including:
1. Checking the engine coolant level and condition.
2. Inspecting the wiring and connections.
3. Updating the ECM software as required.
4. Addressing any issues with the fuel injection system.
When working with the P0117 code, it’s essential to consider the entire engine management system and related components. A thorough inspection and diagnosis are crucial to identifying the root cause and implementing the necessary repairs.
Tools required for diagnostics
The following tools are required for diagnosing the P0117 code:
- Scan tool
- Multimeter
- Wiring diagram
- Repair manual
Technical reference values
The following technical reference values are relevant to the P0117 code:
| Parameter | Normal Range | Fault Indication Behavior |
|---|---|---|
| Engine coolant temperature | 80-100°C | Below 80°C or above 100°C |
18. FAQ
1. What does code P0117 mean?
The P0117 trouble code indicates a low input from the engine coolant temperature circuit, which can affect the engine’s performance, fuel efficiency, and overall operation. When **diagnosing the P0117 code**, it’s essential to consider the entire engine management system, including the coolant temperature sensor, engine control module (ECM), and other related systems.
2. Is it safe to drive with code P0117?
While it’s possible to drive with the **P0117 error**, it’s not recommended, as it can cause decreased engine performance, increased fuel consumption, and potential engine damage. If you must drive, be aware of the engine temperature and watch for any signs of overheating, and consider **fixing the P0117 code** as soon as possible.
3. Will the code clear itself?
The **P0117 trouble code** will not clear itself, as it’s a fault code that indicates a problem with the engine coolant temperature circuit. To clear the code, you’ll need to diagnose and repair the underlying issue, which may involve replacing the sensor, repairing wiring issues, or updating the ECM software.
4. Does the sensor need replacement?
5. How much does it cost to fix?The estimated repair cost for the **Geely P0117** code can range from $200 to $500, depending on the severity of the issue and the labor costs. When **diagnosing the P0117 code**, consider the cost of replacement parts, labor, and any additional repairs that may be required.
Related trouble codes
The following trouble codes are related to the P0117 code:
- Error P0125 on Geely — faulty engine coolant temperature sensor
- Error P0128 on Geely — engine coolant temperature circuit high input
- Error P0130 on Geely — engine coolant temperature circuit malfunction