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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Common Symptoms
- Check Engine Light illuminated
- No noticeable driving issues
- Emissions test failure
- EVAP system monitor incomplete
- No performance impact
Probable Causes (Ranked by Likelihood)
- 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
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
Step-by-Step Diagnostic Procedure
-
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)
Commonly Affected Vehicles
- 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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