P2027 low

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.

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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

Step-by-Step Diagnostic Procedure

  1. Read freeze frame data and confirm P2027

  2. Check sensor connector for corrosion or loose pins

  3. Measure sensor circuit voltage and ground

  4. Test sensor resistance and compare to specifications

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.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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