Hilux low heating output

Hi, I have a 2006 Toyota Hilux with a diesel engine. Recently, the heating output has been too low, especially noticeable on colder days. I scanned for errors and found one stored. I suspect a defective water valve might be the cause. I checked the visible wiring and connectors, but everything seems to be in order. The mileage is 128232 km. Any ideas?

4 comment(s)

Valve blockage is possible, or the connection to the heater core. Have you checked the coolant level? Low coolant can cause poor heating. A defective thermostat could also be the culprit, preventing the engine from reaching optimal temperature.

Coolant level is fine, I already checked that. The thermostat seems okay too, the engine warms up normally. Could a faulty cable or plug connection to the water valve really cause this much trouble?

Yes, a bad connection can definitely cause the symptoms you described. A poor connection will affect the valve's operation. However, it's best to get it properly diagnosed. Take it to a workshop.

Okay, thanks for the advice. I took it to the workshop, and it turned out to be a defective water valve with a faulty connector, just as you suspected. The repair cost 95€, including parts and labor. Heating works perfectly now.

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