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OBD Code P0168

Fuel Temperature Too High

CodeP0168
DescriptionFuel Temperature Too High
Possible CausesFaulty fuel temp sensor|Hot fuel return|Restricted fuel cooling
SymptomsVapor lock risk|Reduced power|Hard hot start
SystemFuel System

What Does P0168 Mean?

Fuel Temperature Too High. This diagnostic trouble code (DTC) is stored when the vehicle's onboard computer detects an issue with the fuel system.

Code Breakdown

P = Powertrain code

0 = Generic (SAE standard)

How to Fix P0168

Follow these diagnostic steps to identify and resolve the issue. Always start with the simplest checks before moving to more involved repairs.

  1. Inspect the fuel temperature sensor connector and wiring.
  2. Test the sensor resistance at a known temperature.
  3. Compare the scan tool reading to the actual fuel temperature.
  4. Replace the sensor if readings are inaccurate.
  5. Clear codes and verify readings during warm-up.

Note: These are general diagnostic guidelines. Some vehicles may have model-specific procedures. Always consult your vehicle's service manual for exact specifications and torque values. If you are not comfortable performing these steps, visit a qualified mechanic.

Frequently Asked Questions

Is P0168 serious?

The severity depends on the underlying cause. Some triggers for P0168 are minor (like a loose gas cap), while others may indicate a more significant problem. We recommend having the code diagnosed with a proper scan tool to determine the exact cause before deciding on urgency.

Can I clear P0168 myself?

You can clear any OBD-II code with a code scanner or by disconnecting the battery for 15-30 minutes. However, clearing the code without fixing the underlying problem will cause it to return — usually within one or two drive cycles. If the code triggered the check engine light, the light will come back on. Fix the root cause first, then clear the code.

How much does it cost to fix P0168?

Repair costs vary widely depending on the root cause. Some fixes are free (like tightening a gas cap) while others can cost several hundred dollars (like replacing a catalytic converter or oxygen sensor). A proper diagnosis with a professional scan tool — not just reading the code — is the first step to getting an accurate repair estimate. Many auto parts stores offer free code reading, but a thorough diagnosis usually requires a mechanic.

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