AutoCodes – GMC – P0168 GMC

P0168 GMC Code - Engine Fuel Temperature Too High

Quick Answer

The Fuel Temperature Sensor is a thermistor type sensor. Common causes include Fuel contamination, Faulty Fuel Tank Temperature Sensor, Fuel Tank Temperature 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: P0168 GMC indicates Engine Fuel Temperature Too High.
Common causes: Common causes include Fuel contamination, Faulty Fuel Tank Temperature Sensor, Fuel Tank Temperature 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.

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Code Popularity 1,177

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 15, 2020

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0168 GMC Description

The Fuel Temperature Sensor is a thermistor type sensor. The Powertrain Control Module (PCM) supplies 5 volts and a ground circuit to the sensor. When the PCM detects a Fuel Temperature Sensor above a pre-determined value, no Malfunction Indicator Lamp (MIL) sets. A fuel cooler located in front of the fuel tank is used to help keep the fuel temperature at an acceptable limit.

OBDII Code P0168 GMC - Engine Fuel Temperature Too High - AutoCodes.com — P0168 GMC Code - Engine Fuel Temperature Too High

What does this mean?

What are the Possible Causes of the DTC P0168 GMC?

Fuel contamination
Faulty Fuel Tank Temperature Sensor
Fuel Tank Temperature Sensor harness is open or shorted
Fuel Tank Temperature Sensor circuit poor electrical connection

How to Fix the DTC P0168 GMC?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0168 GMC 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0168 GMC Code

1. What are the common symptoms of OBDII code P0168 GMC (Engine Fuel Temperature Too High)?

- Common symptoms include engine overheating, poor fuel efficiency, rough idling, and potential stalling.

2. What are the possible causes of OBDII code P0168 GMC?

- Possible causes include a malfunctioning engine coolant temperature sensor, a faulty fuel temperature sensor, a cooling system issue, or a problem with the engine control module.

3. How can I diagnose the cause of OBDII code P0168 GMC?

- Diagnose by checking the engine coolant and fuel temperature sensor readings, inspecting the cooling system for leaks or blockages, and scanning the engine control module for any related fault codes.

4. Is it safe to continue driving with OBDII code P0168 GMC active?

- It is not recommended to continue driving with this code active, as it can lead to engine overheating and potential damage if not addressed promptly.

5. What are some repair tips for resolving OBDII code P0168 GMC?

- Repair tips include checking and replacing faulty temperature sensors, ensuring proper coolant levels and flow, addressing any cooling system issues, and resetting the fault code after repairs.

6. Can a DIY enthusiast fix OBDII code P0168 GMC at home?

- Depending on the underlying cause, some DIY enthusiasts may be able to address this code at home by following diagnostic steps and replacing sensors or addressing cooling system issues.

7. Does OBDII code P0168 GMC affect vehicle performance?

- Yes, this code can affect vehicle performance by causing issues such as poor fuel efficiency, rough idling, and potential engine stalling.

8. How important is it to address OBDII code P0168 GMC promptly?

- It is important to address this code promptly to prevent potential engine damage and ensure optimal vehicle performance and fuel efficiency.

9. Can extreme weather conditions contribute to triggering OBDII code P0168 GMC?

- Yes, extreme weather conditions, particularly high ambient temperatures, can contribute to triggering this code due to increased strain on the engine cooling system.

10. Are there any preventive measures to avoid OBDII code P0168 GMC in the future?

- Preventive measures include regular maintenance of the cooling system, monitoring coolant levels, and promptly addressing any signs of overheating or cooling system issues.