P06FFEconomy Mode Lamp Control Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- When the engine module switches a lamp through its own wire, it checks the output driver electrically like other lamp outputs: with the lamp off the line must carry supply voltage, with it on nearly 0 V – GM's MIL driver, for example, flags an open circuit at 200 kΩ or more. It cannot see whether the bulb lights, and on cars that send the lamp command over CAN such faults appear as U codes. P06FF concerns an economy indicator such as an ECO lamp that the engine module switches directly; the code reports a fault in its control circuit. It should not be confused with a body electrics 'economy mode' that saves battery energy. No manufacturer document available to us uses this code; the description follows CARB's output check and other lamp circuits. Driving is not affected.
- What you may notice
- ECO indicator not working or permanently lit
- No effect on driving
- Likely causes
- LikelyWire or connector to the lamp open or shorted
- PossibleLamp or instrument cluster faulty
- RareEngine module
- Repair
- Easy · Often possible to do yourself.Typical cost: €30 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.