P2669
Actuator Supply Voltage "B" Circuit/Open
- Severity
- High
- Driving
- Drive only to a garage
An open circuit or general fault in actuator supply voltage "B". This is the supply the module provides to a group of actuators - solenoids, valves, relays - rather than to sensors. When it is lost, everything on that supply stops working at once, so expect several actuator codes together rather than one.
Possible causes
- CommonBlown fuse on the actuator supply
- CommonWiring or connector fault on the supply circuit
- CommonOne actuator failed internally and shorted the supply
- PossibleCorroded or water-ingressed connector
- PossibleFailed relay feeding the supply
- PossibleFailed control module supply driver
What you might notice
- Several actuator codes at once
- Limp mode or reduced power
- Engine running badly or not starting
- Multiple systems inoperative together
- Check engine light on
What to check, in order
- Check the fuses first. A blown fuse on a shared supply is the cheapest possible cause and it explains every code stored alongside.
- List which actuators have faulted - they share supply "B", and that list tells you which circuit to trace.
- Disconnect actuators on that supply one at a time while watching the supply voltage. Recovery identifies the one that is shorting it.
- Inspect connectors for water and corrosion.
- Do not diagnose the individual actuator codes until the supply is restored.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Computer output circuits and control module
P2600P2601P2602P2603P2604P2605P2606P2607P2608P2609P2610P2611P2612P2613P2614P2615P2616P2617P2618P2619P2620P2621P2622P2623P2624P2625P2626P2627P2628P2629P2630P2631P2632P2633P2634P2635P2636P2637P2638P2639P2640P2641P2642P2643P2644P2645P2646P2647P2648P2649P2650P2651P2652P2653P2654P2655P2656P2657P2658P2659P2660P2661P2662P2663P2664P2665P2666P2667P2668P2669P2670P2671