P0181: Fuel Temperature Sensor A Circuit Range/Performance
Can you still drive? Yes, it is safe to drive. The engine management system can compensate, but fuel economy may be slightly affected.
What Does P0181 Mean?
Code P0181 means the fuel temperature sensor is providing readings that are out of the expected range or do not correlate logically with other temperature readings. For example, if the engine has been sitting overnight and the fuel temperature sensor reads significantly different from the ambient or coolant temperature, this code may be set.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty fuel temperature sensor
- Poor electrical connection at the sensor
- Sensor reading is skewed by heat soak from nearby components
- ECM calibration issue
Symptoms
- Check engine light on
- Slightly reduced fuel economy
- Hard starting in extreme temperatures
- Engine performance slightly off
Diagnostic Steps
- 1Compare fuel temperature sensor reading to ambient temperature on a cold engine
- 2Check the sensor connector for corrosion or loose pins
- 3Measure sensor resistance at various temperatures and compare to specs
- 4Check for technical service bulletins related to this sensor
- 5Replace the sensor if readings do not match specifications
Recommended Parts & Tools
fuel temperature sensor
electrical contact cleaner
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $80 - $300 |
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Chat with AI About P0181Commonly Affected Vehicles
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Frequently Asked Questions
Why does fuel temperature matter?
Fuel density changes with temperature. The ECM uses the fuel temperature sensor to adjust injector pulse width for accurate fuel delivery, which is especially important in diesel engines.
Is P0181 common on diesel engines?
Yes, P0181 is most commonly seen on diesel vehicles because diesel fuel delivery systems rely more heavily on accurate fuel temperature data.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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