OBD-II code · Powertrain (generic, extended)
P2A4D Alternative Fuel Temperature Sensor Circuit Low
Voltage on the alternative fuel temperature sensor signal line is below the expected window. Wire shorted to ground or sensor short.
Is it safe to drive with P2A4D?
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 ground
- PossibleInternal sensor short
- 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
- P2A4AAlternative Fuel Tank C Pressure Sensor Circuit Intermittent/Erratic
- P2A4BAlternative Fuel Temperature Sensor Circuit
- P2A4CAlternative Fuel Temperature Sensor Range/Performance
- P2A4EAlternative Fuel Temperature Sensor Circuit High
- P2A4FAlternative Fuel Temperature Sensor Circuit Intermittent/Erratic
- P2A50Alternative Fuel Vaporizer A Outlet Temperature Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.