I have received this code for my LR4. Took it into the mechanic and automatically they say its a fuel pump when I have zero signs of the car acting like it is the fuel pump. There was a TSB for a software update to fix this code, is there any possibility it is not a fuel pump? If so how hard is the fuel pump to replace, I know I need to drop the tank just havent found many videos on replacing this. Thanks!

 

They also said fuel pumps are a common fix for a 2016 LR4 is this true? Because I have also been told they are very good and rarely go out.

 

As you noted, there is a software update for the P0089 code. There also is a TSB for fuel pumps, and I have heard of them becoming weak and needing replacement. I wouldn’t say it’s common, and the TSB seemed to be more noise-complaint focused as I recall.

My 2016 had a P0089 code pop up once while still under warranty. Dealership did the software update and it never returned. That was about 20K miles ago. What I don’t know is how the software update is fixing the problem. Is it truly a glitch, or are the pumps actually wearing out and the software update is just increasing the tolerance for lower fuel pressure range so it doesn’t trigger the codes as fast. Still, given the mileage I’ve driven since, seems to be okay.

A proper diagnostic would just be to look at the fuel rail pressure and see if its within range at different RPMs. You can look at fuel rail pressure with the GAP tool. I don’t know what the proper pressure range is, but the dealer should know. You also could compare to another car that seems healthy. Happy to check my own for comparison if you have the means to check yours.

 

They mentioned mine will be the lower pressure fuel pump so the one in the tank. Correct me if im wrong but is the TSP for the high pressure right? Its currently at the dealer right now so I can get that information to answer if you would like to provide me with what yours is. Like i mentioned I do not feel any of the symptoms of how a car should feel if a fuel pump has gone bad. They are also telling me they will not update my software unless a new pump is installed which does not seem correct to me.

 

Just got word that their "technician does not recommend updating until pump is installed"? Does this make sense because I do not see a reason to not update?

 

You are correct - the TSB I mentioned was for the HP fuel pump. The in-tank low pressure fuel pumps have been a problem. They seem to wear out over time. But, there is a recall on the fuel tank pump assembly retaining flange (it cracks and leaks), so the LP pump should be changed at the same time that flange is replaced (all part of the same assembly). The parts for the recall are not yet available as I understand it. Not sure if all parts will be covered, but at the very least, the labor should be much less if they swap the pump when the tank is already dropped. Ask the tech about it.

The other problem that can cause this code is the fuel rail pressure sensor.

No idea why they don’t want to do the update before replacing the pump. You should ask.

 

I have this error and havent been able to find a solution over the past 9 months. Errors P008A-07 and P089-64. They first replaced the sensor when the dropped the tank during the tank recall job. They couldnt figure out if it was the pump or sensor but said pumps usually dont go out and if it was, the car wouldn't start. The code went away for a month or so then came back. Then they updated the firmware. Code went away for a bit but cane back on. Stumped. My indy says last option is to replace the pump....

Any ideas?

 

I have exactly the same issue, the codes started popping up after the recall work was completed. Wishing I never did the recall. My car runs perfectly and it seems like it is an electrical or emissions problem.

I've had the low pressure sensor and the low pressure pump replaced and no love.

Pissed that they didn't replace the filter when they did the pump. Contemplating dropping the tank and doing it myself since they rape me on the cost.

Also wondering if it's a high pressure sensor or O2 issue....

Looking into buying a high $$$ code reader to see if it says anything different.

Super frustrated.

 

Well im glad im not the only one. Two different dealer techs said they rarely see the pumps fail, and if they did, the car wouldn't start.

Did you try the PCM update?

Im wondering about the "Oxygen Sensor-Downstream Right" issue and the fuel filter.

Is there anyway to just turn off a check engine code?? I had my indy do it on my old LR3 for a tire pressure light on the spare tire.

 

The code readers reset the codes, but do not delete "permanent" codes. Those have to come off naturally during drive cycles after the problems are addressed. Perhaps some systems can be disabled, like the TPMS.

The last time to the dealership they applied the Technical Service Bulletin ECM update. The check engine light stayed off for about 2 weeks then returned during a subsequent 400 mile trip. Both codes keep coming back. First P0089 and then P008A. The dealership said it was P0089-64. My reader doesn't give secondary codes.

The O2 sensors have their own codes according to the repair manual. Wether or not my cheap ACTRON reader can read them? I don't know? Going to try a different reader this week.

Like I said before, as far as I know, my fuel filter was NOT replaced when the pump was done, which is suspect to me at this point. I wasn't fully aware of the situation when the recall was completed and it caught me off guard when the code first popped up. It looks like the filter is part of the gas tank "cover" assembly. It's definitely a separate part not associated with the low pressure fuel pump assembly.

I've read that some people have replaced a high pressure fuel sensor, supposed to be located in the engine compartment. Haven't checked into that yet. This car isn't my daily driver anymore and it runs fine so I work on it when I get around to it.

Another issue could be the two mechanical high pressure pumps located on the engine. Those look like a total PITA to get to and probably would cost a fortune to fix if I went to the dealership. Not thrilled about the prospect of doing it myself. Hoping this journey doesn't lead me there.