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nabilc
nabilc,
Category: Car
Satisfied Customers: 3498
Experience:  Manager/co-owner at Autotronic
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Hummer H2 2003 HUMMER H2 gets high oil pressure reading way

Customer Question

2003 HUMMER H2 gets high oil pressure reading way over the limit. When car is not on it reads 40PSI, when it starts 80PSI or more. Just after changed oil pressure sensor(BWD) cluster needle turned 360 degree clockwise. After disconnecting reconnecting battery all went normal for day or so it start reading 80psi when car starts. NOW WHAT???
Submitted: 6 years ago.
Category: Car
Expert:  nabilc replied 6 years ago.

Billy :

Hello and thank you for using Just answer! I'm Billy and i will assist you with this. Feel free to ask if you need any further info.

Billy :

First here is how the system works:

Billy :

The IPC (instrument panel)displays the engine oil pressure as determined by the PCM(powertrain control module). The IPC receives a class 2 message from the PCM indicating the engine oil
pressure. The engine oil pressure gage defaults to 0 kPA (0 psi) or below if:
- The PCM detects a malfunction in the engine oil pressure sensor circuit.
- The IPC detects a loss of class 2 communications with the PCM.

Billy :

You will notice that overpressure is not indicated (as not normally possible).....

Billy :

However, you seem to have a faulty instrument panel, or specifically the oil gauge.

Billy :

It seems that the gauge is somehow mechanically stuck.

Billy :

There two options (both of which require the removal of the cluster).

Billy :

You remove the cluster, and check if you can move the gauge by hand to proper position.....

Billy :

If that does not work, the instrument cluster would need replacing....

Billy :

Regards,

Billy :

Billy