OBD-II code · Powertrain (generic, extended)
P2A4E Alternative Fuel Temperature Sensor Circuit High
Voltage on the alternative fuel temperature sensor signal line is above the expected window. Wire shorted to B+ or sensor open.
Is it safe to drive with P2A4E?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to B+
- PossibleOpen temperature sensor
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Alt Fuel Temperature Sensor, Wiring Harness, Afcm
Related codes
- P2A4BAlternative Fuel Temperature Sensor Circuit
- P2A4CAlternative Fuel Temperature Sensor Range/Performance
- P2A4DAlternative Fuel Temperature Sensor Circuit Low
- P2A4FAlternative Fuel Temperature Sensor Circuit Intermittent/Erratic
- P2A50Alternative Fuel Vaporizer A Outlet Temperature Sensor Circuit
- P2A51Alternative Fuel Vaporizer A Outlet Temperature Sensor Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.