Evaporative Emission System Fuel Vapor Temperature Sensor Circuit High
The P2027 code means the vehicle's onboard diagnostic system has detected: Evaporative Emission System Fuel Vapor Temperature Sensor Circuit High. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $300 (parts and labor)
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What Are the Symptoms of P2027?
- Check Engine Light illuminated
- No noticeable driving issues
- Emissions test failure
- EVAP system monitor incomplete
- No performance impact
What Causes P2027? (Most Likely First)
- Short to voltage in vapor temperature sensor circuit Very High
- Defective fuel vapor temperature sensor High
- Open ground wire in sensor circuit Moderate
- Corroded connector pins Moderate
- PCM input driver issue Low
Can I Still Drive with P2027?
Yes, but fix soon. P2027 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
What does P2027 mean?
P2027 means the fuel vapor temperature sensor circuit is reading above the maximum expected voltage, typically from a short to voltage or open ground in the wiring.
Can I drive with a P2027 code?
Yes, you can drive safely. This code only affects the EVAP emissions monitoring system.
How much does it cost to fix P2027?
Repair costs are typically $100 to $300 for sensor or wiring repair.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2027?
-
Read freeze frame data and confirm P2027
-
Check sensor connector for corrosion or loose pins
-
Measure sensor circuit voltage and ground
-
Test sensor resistance and compare to specifications
Sources 1
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)
Which Vehicles Commonly Get P2027?
- 2012-2018 BMW 328d 2.0L Diesel
- 2010-2016 Mercedes-Benz ML350 3.0L BlueTEC
- 2014-2020 Ram 3500 6.7L Cummins
- 2011-2017 Ford F-350 6.7L Power Stroke
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