OBD-II code · Powertrain (generic, extended)
P205E Reductant Tank Temperature Sensor A Circuit Intermittent/Erratic
DEF tank temperature sensor A signal jumps or drops out intermittently — connector or harness issue.
Is it safe to drive with P205E?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntermittent connector
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Reductant Tank Temperature Sensor
Related codes
- P205AReductant Tank Temperature Sensor A Circuit
- P2ADDReductant Tank Temperature Sensor B Circuit Intermittent/Erratic
- P205BReductant Tank Temperature Sensor A Circuit Range/Performance
- P205CReductant Tank Temperature Sensor A Circuit Low
- P205DReductant Tank Temperature Sensor A Circuit High
- P205FReductant System Performance (Bank 2)
- P2060Reductant Injection Air Pump Control Circuit Low
- P2061Reductant Injection Air Pump Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.