P0087 code LR2 2008
#11
p_gill, many thanks for the response. I will love to have the sensor go bad rather than the pump. The bosch sensor is just 50 USD and is a DIY while the pump change on this car is probably the most laborious item to replace.
Why I am questioning that the sensor is wrong because even if the sensor is faulty and underreporting, the control module should just speed up the pump to hit the desired 54 psi. The pressure is staying at 50 psi for me which means that I am at the max what the pump can achieve (either due to faulty pump or blockage) because the control module is definitely aware that the target pressure value is 54 psi and not 50 psi. So even if sensor is faulty (underreporting), the control module should be commanding the pump to speed up to hit the desired pressure of 54 psi.
Why I am questioning that the sensor is wrong because even if the sensor is faulty and underreporting, the control module should just speed up the pump to hit the desired 54 psi. The pressure is staying at 50 psi for me which means that I am at the max what the pump can achieve (either due to faulty pump or blockage) because the control module is definitely aware that the target pressure value is 54 psi and not 50 psi. So even if sensor is faulty (underreporting), the control module should be commanding the pump to speed up to hit the desired pressure of 54 psi.
Just change the sensor like I told you. You already know it's cheap and an easy DIY. Repeatedly trying to somehow rationalize to yourself what the sensor, ECU or pump should be doing to report normal pressure is a waste of time. If that doesn't fix it you need to take the car to someone with a more advanced diagnostic computer to find out what is the underlying detailed error code, but right now changing the sensor is most logical action to take.
#14
Before you start this little project, be sure you have a low-profile wrench (Torx T25) to fit into the tight space around the sensor. I haven't done this replacement yet myself (it's on my list), but reading about it indicates this is a pain point for some.
#15
Removing the T25 is the most difficult part. I used a key to get it loose and then a T25 screw driver to remove it the rest of the way.
I did eliminate the T25 s that it will be simple to change out next time (see the link for more information)
Pictures for my S80 are here (in case you didn't know the Engine in my LR2 and S80 are the same) https://www.matthewsvolvosite.com/fo...7687&start=110
Take care
Paul
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#16
Thanks for the link, but you didn't indicate the size of the replacement for the T25 bolt so one can be purchased in advance. Do you know the diameter, thread pitch, and length?
#17
#18
Replaced it, ordered Bosch 0261230238 from Amazon (Only 32 USD) . Interestingly Amazon states that it will not fit LR2 2008 but it will and is the correct part. Some sites suggest that the correct part is 0261230238 and others suggest it is 0261230110. Both will work as I checked the specs in detail.
I did not have the tool to remove the sensor easily as such ended up taking out the rail (which is not difficult at all and allowed me to clean the injectors).
The positive is that the car is very responsive to increased loads and I am overall happy that I changed the part as it runs like new however the P0087 code is still there. Recorded fuel rail pressure is same at near 50 psi rather than 54 psi.
I cleared the code with the scanner before it came back however I will also do a hard reset by disconnecting the battery. If the code returns, I will just ignore and keep an eye on fuel pressure and see if it deteriorates over time.
I did not have the tool to remove the sensor easily as such ended up taking out the rail (which is not difficult at all and allowed me to clean the injectors).
The positive is that the car is very responsive to increased loads and I am overall happy that I changed the part as it runs like new however the P0087 code is still there. Recorded fuel rail pressure is same at near 50 psi rather than 54 psi.
I cleared the code with the scanner before it came back however I will also do a hard reset by disconnecting the battery. If the code returns, I will just ignore and keep an eye on fuel pressure and see if it deteriorates over time.
Last edited by menagerie; 07-27-2021 at 06:05 PM.
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flybd5 (07-26-2021)
#19
Replaced it, ordered Bosch 0261230238 from Amazon (Only 32 USD) . Interestingly Amazon states that it will not fit LR2 2008 but it will and is the correct part. Some sites suggest that the correct part is 0261230238 and others suggest it is 0261230210. Both will work as I checked the specs in detail.
I did not have the tool to remove the sensor easily as such ended up taking out the rail (which is not difficult at all and allowed me to clean the injectors).
The positive is that the car is very responsive to increased loads and I am overall happy that I changed the part as it runs like new however the P0087 code is still there. Recorded fuel rail pressure is same at near 50 psi rather than 54 psi.
I cleared the code with the scanner before it came back however I will also do a hard reset by disconnecting the battery. If the code returns, I will just ignore and keep an eye on fuel pressure and see if it deteriorates over time.
I did not have the tool to remove the sensor easily as such ended up taking out the rail (which is not difficult at all and allowed me to clean the injectors).
The positive is that the car is very responsive to increased loads and I am overall happy that I changed the part as it runs like new however the P0087 code is still there. Recorded fuel rail pressure is same at near 50 psi rather than 54 psi.
I cleared the code with the scanner before it came back however I will also do a hard reset by disconnecting the battery. If the code returns, I will just ignore and keep an eye on fuel pressure and see if it deteriorates over time.