The P0168: Fuel Temperature Too High indicates that the fuel temperature has exceeded the acceptable range. This can result from overheating fuel, a faulty fuel temperature sensor, restricted fuel flow, or a malfunctioning PCM.
P0168 – Quick Overview
| Meaning | P0168: Fuel Temperature Too High |
| Is it serious? | Yes, this code is serious because excessively high fuel temperatures can lead to poor engine performance and potential engine damage if not addressed. |
| Possible causes | – Overheating fuel – Faulty fuel temperature sensor – Restricted fuel flow – Faulty PCM |
| How to diagnose? | – Inspect the fuel temperature sensor for proper operation. – Check the fuel system for restrictions. – Test the sensor using a scan tool. – Replace or repair any faulty components. |
P0168 Meaning
The P0168: Fuel Temperature Too High code indicates that the temperature of the fuel is too high, which could affect the engine’s performance and efficiency. This might be due to overheating fuel, a malfunctioning sensor, or a problem in the fuel system.
Step-by-step diagnostic guide
Follow the outline procedure to diagnose this DTC by eliminating possible causes one by one.
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check if there are any other related codes present. These might give additional clues about the problem. | OBD-II Scanner |
| Inspect the Fuel Temperature Sensor | Check the fuel temperature sensor for proper operation. Look for signs of damage or wear and ensure it is securely connected. | Flashlight, Safety Gloves |
| Test the Sensor Using a Scan Tool | Use a scan tool to monitor the fuel temperature readings and compare them with the manufacturer’s specifications. | OBD-II Scanner, Scan Tool |
| Inspect the Fuel System for Restrictions | Examine the fuel lines, filter, and pump for any restrictions or blockages that could be causing the fuel to overheat. | Flashlight, Fuel System Tester |
| Repair or Replace Faulty Components | If any components, such as the fuel temperature sensor or restricted fuel lines, are found to be faulty, repair or replace them as necessary. Ensure all connections are secure and functioning properly. | Replacement Fuel Temperature Sensor, Fuel Line Repair Kit, Wire Strippers |
| Clear the Code and Test Drive | After completing the necessary repairs, clear the P0168 code using the OBD-II scanner. Take the vehicle for a test drive to ensure the issue is resolved and the code does not return. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P0168 code has not reappeared. If the code returns, further diagnosis may be required. | OBD-II Scanner |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko