Error code

OBD2 P2028

OBD2P2028
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Evaporative Emissions (EVAP) Fuel Vapor Temperature Sensor Circuit Intermittent.

Severity

moderateCan be driven, but may cause emissions issues.

Summary

P2028 indicates an intermittent issue with the fuel vapor temperature sensor circuit in the EVAP system, which is used to detect leaks and ensure proper functioning of emissions control.

Common Causes

  • Damaged or corroded wiring and connectors
  • Defective fuel vapor temperature sensor
  • Failure of a reference voltage circuit affecting multiple sensors

Diagnosis

  1. Inspect and repair any damaged or corroded wiring and connectors.
  2. Check for other EVAP system codes to determine if the issue is isolated.
  3. Test the fuel vapor temperature sensor for proper operation.

Fixes

  • Replace the faulty fuel vapor temperature sensor

FAQ

What does P2028 mean?

P2028 indicates an intermittent issue with the EVAP system's fuel vapor temperature sensor circuit.

How do I fix it?

Inspect and repair wiring issues, test the sensor for proper operation, and replace if necessary.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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