Fuel Temperature Sensor A Circuit Malfunction
The P0180 code means the vehicle's onboard diagnostic system has detected: Fuel Temperature Sensor A Circuit Malfunction. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $50 - $250 (fuel temp sensor $30-$100; labor $50-$150)
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What Are the Symptoms of P0180?
- Check Engine Light on
- Slightly reduced fuel economy
- No major drivability symptoms
- Engine may run slightly rich or lean
- Possible hard starting in extreme temperatures
What Causes P0180? (Most Likely First)
- Failed fuel temperature sensor Very High
- Wiring issue -- open or short in the sensor circuit High
- Corroded or damaged connector Moderate
- Poor ground connection for the sensor Moderate
- PCM internal fault Low
Can I Still Drive with P0180?
Yes, but fix soon. P0180 is rated low severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.
Frequently Asked Questions
Can I drive with code P0180?
Yes, you can drive normally. The PCM uses fuel temperature data for minor fuel delivery adjustments. Without it, the engine will still run but may be slightly less efficient.
What does the fuel temperature sensor do?
The fuel temperature sensor measures the temperature of the fuel in the fuel rail or fuel line. The PCM uses this data to fine-tune fuel injection volume since fuel density changes with temperature -- hot fuel is less dense and requires more volume.
Is this code more common on diesel engines?
Yes. Diesel engines rely more heavily on fuel temperature data because diesel fuel density varies more with temperature than gasoline. The fuel temperature sensor is critical for accurate fuel metering on diesels.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0180?
-
Read the fuel temperature on a scan tool with the engine cold (sitting overnight). It should be within 10 degrees F of ambient temperature. A reading of -40 degrees F or 300+ degrees F indicates a circuit fault.
-
Disconnect the fuel temperature sensor and measure its resistance. It should follow a temperature-resistance curve similar to a coolant temp sensor (2,000-3,000 ohms at 68 degrees F).
-
Check the 5V reference voltage and ground at the sensor connector with the sensor disconnected.
-
Inspect the wiring for damage, especially near the fuel tank and along the fuel line routing.
-
Check the connector for corrosion or fuel contamination.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
P0180 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
Which Vehicles Commonly Get P0180?
- 2003-2014 Dodge Ram (5.9L, 6.7L Cummins diesel)
- 2005-2015 Ford F-250 (6.0L, 6.7L Power Stroke diesel)
- 2007-2016 Chevrolet Silverado HD (6.6L Duramax diesel)
- 2008-2017 Toyota Land Cruiser (4.5L diesel)
- 2010-2018 VW Jetta TDI (2.0L diesel)
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