P06D6
Sensor Reference Voltage F Circuit Open
The 5-volt sensor reference rail F is open — the module supplies no voltage on this circuit. Every sensor powered from reference F loses its supply and reads invalid, so the ECU substitutes default values and may limit engine operation. Causes: a broken reference wire, a disconnected connector, or an internal open in the module's voltage regulator for rail F.
The 5-volt sensor reference rail F is open — the module supplies no voltage on this circuit. Every sensor powered from reference F loses its supply and reads invalid, so the ECU substitutes default values and may limit engine operation. Causes: a broken reference wire, a disconnected connector, or an internal open in the module's voltage regulator for rail F.
Common causes
- high
Open in shared reference rail
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-440
- low
Pin pushed back out of connector body
Less common, but worth ruling out after the more likely causes.
Typical part cost: $90-440
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
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Frequently asked questions
What does P06D6 mean?
P06D6 means "Sensor Reference Voltage F Circuit Open". It is a generic OBD-II code that points to a fault in the computer & auxiliary output controls.
What are the most common causes of P06D6?
open in shared reference rail; pin pushed back out of connector body; cracked solder joint inside the module or sensor — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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