OBD-II code · Powertrain (generic, extended)
P2028 EVAP Fuel Vapor Temperature Sensor Circuit Intermittent
The EVAP fuel-vapor temperature sensor signal jumps or drops out intermittently — usually a connector or chafed wire.
Is it safe to drive with P2028?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntermittent connector or chafed wire
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Evap Fuel Vapor Temp Sensor, Evap Harness
Related codes
- P2024EVAP Fuel Vapor Temperature Sensor Circuit
- P2025EVAP Fuel Vapor Temperature Sensor Performance
- P2026EVAP Fuel Vapor Temperature Sensor Circuit Low Voltage
- P2027EVAP Fuel Vapor Temperature Sensor Circuit High Voltage
- P2029Fuel Fired Heater Disabled
- P202AReductant Tank Heater Control Circuit/Open
- P202BReductant Tank Heater Control Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.