OBD-II code · Powertrain (generic)
P06F3 Reductant Control Module Internal Temperature Sensor Circuit High
Same as P06F0 with the signal voltage above the plausible range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P06F3?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor internal open
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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
- 1–3 h
- Emissions test
- Likely to fail
- Parts involved
- Reductant Control Module
Related codes
- P06F0Reductant Control Module Internal Temperature Sensor Circuit
- P06F1Reductant Control Module Internal Temperature Sensor Range or Performance
- P06F2Reductant Control Module Internal Temperature Sensor Circuit Low
- P06F4Stop-Start Mode Lamp Control Circuit
- P06F5Glow Plug Control Module 2
- P06F6Glow Plug Control Module 2 Control Circuit Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.