Ford Fiesta: common OBD faults across the EcoBoost years
One question dominates a used Fiesta purchase, and it is about a belt that runs in engine oil. Everything else is secondary.
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Ford Kuga and Puma: wet belt, hybrid and the checks that matter
Two Fords sharing engines with the Fiesta and Focus, plus hybrid systems that add their own considerations. The wet belt question applies to both.
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Ford Ranger: diesel pickup diagnostics for a working vehicle
Bought to tow and carry, and often used for neither. That mismatch produces most of what goes wrong, and it is visible in two readings.
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Fuel flap stuck shut: the release you did not know about
Standing at a pump with a flap that will not open is a bad moment to start learning. Most vehicles have a manual override, and it is worth finding now.
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Crunch on downshift: synchros, clutch drag or oil
A crunch going into a lower gear usually means the clutch is not fully releasing, not that the gearbox is worn out. The distinction is worth several hundred.
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Geely Coolray and Atlas: turbo DI diagnostics on a newer brand
Geely engineering sits behind several familiar badges. The engines read normally on generic OBD-II, which is the practical starting point.
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Handbrake warning stays lit: switch, fluid level or EPB
The same lamp reports three different things depending on the car, and one of them is a brake fluid level you should check before driving.
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Hard to start when hot: the fault that hides on a cold morning
A car that starts perfectly cold and struggles when hot has a specific set of causes, and heat is doing the diagnosis for you.
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Hissing from the vents: blend door, refrigerant or a blocked drain
Some hissing from the dashboard is normal air conditioning behaviour. Some is a leak. The timing and the accompanying smell separate them.
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Honda Jazz and HR-V: CVT care and VTEC oil dependence
Two well-built cars where almost everything that goes wrong traces to one of two fluids. Both are checkable before they become expensive.
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Humming that rises with speed: bearing, tyre or driveline
Three causes, and a free road test that separates them. Doing that test first stops people buying tyres for a bearing problem.
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Hyundai i30 and i20: European Hyundais and their fault patterns
Designed and built largely for Europe, with the group engine range. Knowing which engine you have matters more here than the badge on the boot.
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