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How to Fix When Your Car Doesn't Switch from Petrol to LPG

Model: (Various brands) Various
Part: Checks and maintenance

Video tutorial

A common issue with dual-fuel systems is when the car doesn't switch from petrol to LPG or switches back to petrol on its own. Here's how to address this problem. The issue usually comes from the solenoid valve that controls the tap that opens when switching to LPG. Removing it is easy; first, disconnect the electrical connector (take a photo to remember the correct position) and unscrew the 8 mm bolt on the head.

Test the coil's operation with a multimeter set to Ohms. If the coil is functioning, great; if not, it can be replaced for just over £10. To reinstall it, place it back in its support, reattach the bolt with its washer, and reconnect the electrical connectors.

It's a good idea to spray some WD-40, as sometimes the electrical contacts may not be clean enough.


Updated on 9 August 2026 by ScegliAuto


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by ScegliAuto

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