XK / XKR ( X150 ) 2006 - 2014

Low Fuel warning with full tank

 
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Old 04-29-2019, 09:20 AM
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Default Low Fuel warning with full tank

Filled the car up yesterday morning and set off to a XK club breakfast meet yesterday morning. I'd done about 45 miles cruising the motorway at 70 and saw "LOW FUEL" warning on the dash, and the bar gauge showed totally empty. I pulled over and checked under the car and in the engine bay, no sign or smell of leaking fuel and the engine was still running fine. Switched off for a few moments and back on again and the gauge was back to normal and showing plausible values whenever I looked at it, given the miles I'd done.

I haven't checked for codes with SDD yet but just wondered if anyone else had had seen this and done any reading on this?
 
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Old 04-29-2019, 01:50 PM
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Low battery gremlin?
 
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Old 04-29-2019, 03:01 PM
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That'd be my guess
 
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Old 04-29-2019, 04:11 PM
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Did cross my mind too but the car was attached to the C-Tek all night right up to setting off. Battery condition is good, as far as I'm aware.
 
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Old 04-29-2019, 04:31 PM
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From the manualFuel Level Display

The fuel level display is a linear LCD display to show the usable fuel tank contents. The level display is active at all times when the ignition is on. Low fuel level is displayed as a LOW FUEL LEVEL message and an amber warning triangle in the message center.

The fuel level is obtained by fuel level sensors in the fuel tank. These are monitored by the auxiliary junction box software and their output resistance values, corresponding fuel quantity, are transmitted to the instrument cluster on the medium speed CAN bus. The instrument cluster uses the two level sensor signals to calculate the fuel tank contents. This calculation takes into account fuel movement in the tank to display a steady fuel quantity in the LCD.

The fuel level information is transmitted on the medium speed and high speed CAN bus for use by other vehicle system modules.

Not much to add. Failing sensor possibly but likely an anomaly. Kind of guessing without a code.
 

Last edited by Sean W; 04-29-2019 at 04:42 PM.
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Old 04-29-2019, 04:34 PM
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I did a basic scan with Torque Pro, nothing showing there. I'll get SDD out tomorrow but not expecting to find anything - I'd have thought any fuel related codes would be P codes (powertrain) and I'm pretty sure Torque Pro covers all of those.
 
 
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