P2668

Fuel Mode Indicator Lamp Control Circuit

Severity

✅ Low

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$3–17 (est.)

Symptoms

Check Engine Light Is On
Fuel mode indicator lamp does not work
The fuel mode indicator lamp is constantly on
It is impossible to determine the current operating mode of the fuel system

Causes

Open or short circuit in the lamp circuit
Malfunction of the indicator lamp itself
Relay or fuse problems
Engine control unit (ECU) malfunction
Poor contact in circuit connectors

How to Fix

Check fuses and relays associated with the indicator circuit
Check the integrity of wiring and connectors
Check the functionality of the indicator lamp
Scan the ECU for additional errors
If necessary, replace the lamp or repair the wiring

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