Freelander dtc P1190

Hi out there..

Don’t know if anyone has come across a Td4 with simlar problem, not quite sure where to start so will waffle away.

Have a freelander Td4 drives fine till it gets to 2000 rpm when turbo cuts in just looses power.
Plugged into computer & comes up with P1190 fuel rail pressure plausibility.
On live data the low pressure side shows 400 mbars fluctuates few mbars either way, But high pressure on idle fluctuates between 28000 & 32000 mbars & as you increase the revs it goes through the roof 70000 to 90000 fluctuating 20000+.
Have pluged into another Td4 & idle shows 28000, 2k rpm 32000, 3k 48000, 4k 59000 with hardly any fluctuation(all above values ive rounded for ease)
Also turns over slightly more times than it should before starting.

What ive done.

Changed fuel filter.
Checked inj leak off, No4 slightly higher leak off so blanked injector off with no change to Fuel pressure.
Checked wiring & connections(Ref Landrover TSB)to fuel pressure switch, ECU, Fuel pressure control switch on HP pump.
Changed Fuel pressure control switch on HP Pump.
Changed Fuel rail pressure switch.
Checked all pipes.
Starting to get desparate!! even unplugged MAF sensor.

Also has cut out showing no low fuel pressure but assume that the ECU shutting the engine down.

Any help or suggestions would be greatly appreciated...Cheers

Ps sorry to waffle but thought more info the better.

I'd try the main Freelander section if I was you, it gets more activity than this one

P1190 Calibration Resistor Out Of Range

Hi Hippo... Thanks but that only applies to petrol models..

When you say you checked the fuel rail pressure sensor as per TSB00052/2007, did you drag test the pins on the connector that goes onto the sensor?

The two faults that bulletin deals with is moisture ingress into the connector causing contaminated pins, but also a tolerance error in the production of the parts . The connector doesnt sit tight enough onto the sensor itself and with the vibration of the engine it causes the pins to wear and sprag out.

Thats why the recommended procedure is to change the sensor and fit an overlay.


Its just from your faultcode, it sounds somewhat likely to be the area of issue.

Your fuel rail pressures do look fine, although no4 injector is likely to be causing your poor starting your describing. Is that injector siezed open?

Cheers vissie.. No did'nt will check that..

Hi, and how did you fixed this issue ?
Got same problem ...