P06F2Reductant Control Module Internal Temperature Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Some SCR diesels have a separate reductant control module that drives the DEF pump, heaters and dosing valve – Ford calls it the pump motor controller (fault above 130 °C under P20FF), GM's L5P an SCR power module. It measures its own board temperature with an internal sensor to protect itself from heat. P06F2 means the signal is below its minimum; with the usual NTC voltage divider that is a short to ground, and the reading appears implausibly hot. The opposite fault is P06F3, an implausible reading P06F1. No manufacturer document available to us uses P06F0–P06F3; Ford and GM report related faults under P20FF or own codes. Without a valid temperature the module limits or stops heaters and pump, so dosing is restricted and an SCR warning, up to a start lock countdown, may follow.
- What you may notice
- Check engine light or SCR warning
- Message to check AdBlue system, possibly countdown to start lock
- DEF heating or pump inactive (no thawing in frost)
- Driveability usually unchanged
- Likely causes
- LikelyReductant control module or pump unit faulty (sensor is on the board)
- PossibleWater ingress or corrosion in the module (DEF crystals, underbody location)
- PossibleSupply or ground problems at the module
- RareModule software or calibration
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €400 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.