Lexus IS fuel filter heater error

I'm stressing about my 2005 Lexus IS diesel! It's got 89,000 km and I'm getting an error code related to the fuel filter heater. The car's running rough, with reduced engine power and poor engine response. It's guzzling fuel, and the idling is uneven. I've read it might be a dodgy cable or plug connection. Has anyone else experienced this?

4 comment(s)

Sounds like a pain. Have you checked the voltage at the fuel filter heater connector? Could be a simple wiring issue or a faulty connector. If you have a multimeter, it's worth a shot to see if it's getting power.

Thanks for the tip! I have a multimeter, but I'm a total novice when it comes to electrical stuff. Where exactly should I be probing with the multimeter? And what voltage should I be expecting to see? I don’t want to fry anything!

If you're not comfortable with electrics, best not to poke around too much. A faulty fuel filter heater can definitely cause those symptoms. Given the error code and rough running, it's likely that's the culprit. I'd suggest taking it to a workshop; they can diagnose it properly and replace the heater if needed.

Thanks, I appreciate the advice. I took it to the shop, and you nailed it – it was a corroded connector on the fuel filter heater. 95€ later, it's fixed and running like a champ again! Thanks for the help!

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