Engine light on dash

**Cuppa** · 11th September 2019, 08:51 AM

Can anyone tell me what the potential causes for the engine light to illuminate on the dash are please?

Ours has been coming on & off for a while, but only when on the more severe corrugations. It started after I had changed the main fuel filter. I've checked the wiring connection which seems ok, but am wondering if somehow it could be the float mechanism at the bottom of the filter jumping around........ or something completely different. I recall it happened for a while when we were back home, but can't recall what resolved it, I think it may have just stopped by itself.

**NissanPatrol.com.au** · 11th September 2019 08:51 AM

**MudRunnerTD** · 11th September 2019, 09:30 AM

Mine comes on constantly. drives me nuts. Mine is linked ot the Tacho Sensor which also drops out on mine causing the Aircon to also stop. I need to replace my Tacho Sensor which is about $500 damn it.

As i understand it it is also linked to the sensor on Number 1 injector to the fuel pump. Mine no longer has this sensor so became redundant but yours dies. I expect it is a loose wire to be honest in that environment if all else is fine. Spray the injector 1 with electrical contact cleaner and jiggle the wires around a little and se it that helps at all. Trace that wire from Number 1 and unplug t and clean the plugs.

**Yeti's Beast** · 11th September 2019, 09:59 AM

Or take the globe out

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**0-TJ-0** · 11th September 2019, 12:12 PM

As with Darren mine was doing similar things and it turned out to be the tach sensor in the front of the motor. If that goes it puts the whole egr system into a limp mode of sorts. I don't think it will illuminate even if there is an error with no1 injector though, I've had my no1 unplugged before with no light.

I think the sensor in the fuel filter illuminates a seperate light doesn't it?

**MudRunnerTD** · 11th September 2019, 02:08 PM

Originally Posted by 0-TJ-0

As with Darren mine was doing similar things and it turned out to be the tach sensor in the front of the motor. If that goes it puts the whole egr system into a limp mode of sorts. I don't think it will illuminate even if there is an error with no1 injector though, I've had my no1 unplugged before with no light.

I think the sensor in the fuel filter illuminates a seperate light doesn't it?

Yeah i was hoping it would stop when i put the 12mm pump in and no longer run the #1 Injector link. It cuts out the Aircon and Tacho which sux. Did you replace yours? I am struggling wth the $500 replacement cost but might have to bite the bullet.

**Cuppa** · 11th September 2019, 05:09 PM

Where in the front of the motor is this tacho sensor? Is it worth checking out if I have had no problem with tacho readings, including when engine light is going on & off?

**nissannewby** · 11th September 2019, 05:26 PM

There is a connector on the bottom of the injector pump on the td42ti engine. It will throw the engine light if there is a problem or its disconnected. Being towards the bottom of the engine they can sometimes have a dodgy connection. Also in the rough it could be the wires going to it.

**0-TJ-0** · 11th September 2019, 07:36 PM

Originally Posted by MudRunnerTD

Yeah i was hoping it would stop when i put the 12mm pump in and no longer run the #1 Injector link. It cuts out the Aircon and Tacho which sux. Did you replace yours? I am struggling wth the $500 replacement cost but might have to bite the bullet.

Yep I did mine when I was still running the TI pump. Didn't pay $500 though. I reckon you want the 3 wire https://rover.ebay.com/rover/0/0/0?m...2F292405095715. That looks like a patrolapart item $300ish. Think they were a touch cheaper when I got one.

Cuppa, it's on the front of the engine towards the top middle. You should be able to see the cable for it, 3 wire jobbie i think. Sorry I don't have mine to reference.. It's getting some love after a knob-end ran into the back of it. I think when mine started to fail the tacho was still working. Also check that connector that nissannewby is talking about. That's about the only other sensor that would set that light off I think.

**Hodge** · 11th September 2019, 08:47 PM

Not 100% on this ....
I've read two or three times that a possible culprit could be the ambient sensor.
Apparently when this fails connection with the pump, or gets damaged , it can throw a ecu light.

This is meant to be behind the grille somewhere ,but I never found it on my car.

https://patrolapart.com.au/product/g...ir-temp-sensor

**mudski** · 12th September 2019, 08:24 AM

Originally Posted by Hodge

Not 100% on this ....
I've read two or three times that a possible culprit could be the ambient sensor.
Apparently when this fails connection with the pump, or gets damaged , it can throw a ecu light.

This is meant to be behind the grille somewhere ,but I never found it on my car.

https://patrolapart.com.au/product/g...ir-temp-sensor

That amibient sensor is for the Ti models which have an outside temp display and climate control.

Cuppa, try just disconnecting the loom to the fuel filter and leave it off for a while. If the issue goes you know where to look...

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