2007 Chevy Z71 Motor Light on Oil Pressure Gauge Reads Zero
Chevy Engine Oil Force per unit area
Chevy Engine Oil Pressure Sensor
The Chevy engine oil pressure sensor problem has been going on for a long fourth dimension. With that said, the vehicles with the most pressure switch problems fall in the range of V-8 engines from 2003 through 2012. At some bespeak in the model yr of 2007, Chevrolet realized an issue existed.
They decided to place a filter screen around the Chevrolet engine oil pressure sensor. They did this because they believed sludge and debris institute its mode into the sensor. Not just did this not prepare the problem, it created another. Now sometimes when you pull the protective filter screen out, you lot find it completely clogged.
This means if you supervene upon the oil force per unit area sensor, because yous call up information technology's bad and you do not replace the filter screen around it, the same problem reoccurs. Since the part isn't easy to supersede y'all really want to get information technology right the first time. Unfortunately, people ordinarily read the kickoff paragraph of these articles and just supplant the beginning part mentioned.
I'thousand asking you to hang in there with me and read through this unabridged page. Not only will I provide tips to help with the replacement of this unreliable Chevy engine oil pressure level sensor, only we'll talk near a lot of the bug associated with this repair and the common calculator and sensor codes set up. Finally, nosotros include pictures of exactly where the part is located.
Symptoms of Oil Pressure Problems
The first fourth dimension I ran across the Chevy engine oil pressure problem the client complained about an oil judge that read nil and a check engine calorie-free. Obviously the motor was getting oil pressure level, considering at that place wasn't any dissonance.
Afterwards connecting a scan tool I establish a code P0521 and problem code P0523. These codes stand for engine oil pressure sensor switch performance out of range and sensor high-voltage. Note that it'southward too common to discover a P0520, standing for oil force per unit area sensor excursion malfunction and P0522 excursion voltage low.
Too worth mentioning, a alert message on the dash stated depression oil, turn engine off. This alarm went unheeded past my customer, but you lot should ever follow the instructions simply in case. I've seen General Motors pressure gauges and warning lights malfunctioning since I first got in the concern in 1984.
Standard diagnosis procedures remain the same. The way to observe out what'due south wrong with the machine is to remove the oil pressure level sensor or switch and connect a mechanical gauge. This style y'all're reading the mechanical engine oil pump pressure level and not trusting the electronics that report this reading.
Although I still believe in this method of diagnosis, most people don't accept a mechanical oil pressure gauge. However, if you have a Chevy 5-viii engine between the model years of 2003 through 2012 it's probably safe to bypass the standard diagnostic procedure. After dealing with this trouble I have found zero but a malfunction of the Chevy engine oil pressure sending unit.
Replacing the Chevy Engine Oil Pressure Sender
Chevy Engine Oil Pressure Sensor Location
The location of the oil pressure level sender remains an outcome for virtually practise-information technology-yourself mechanics. Equally y'all can see from the motion-picture show it is a tight fit. They locate it in forepart of the transmission bell housing where it bolts to the motor.
I hate to tell y'all to buy a special tool that you'll simply utilise ane time. However, in this state of affairs I'm recommending that you get the special tool designed to remove the pressure switch. The special socket has an actress sparse wall that allows you to go it over the sensor easily.
A standard one 1/16th deep socket doesn't fit tight plenty on the factory installed office. And my 27 mm deep bear on socket was too thick to fit over the sensor. Chances are, if you own this vehicle long plenty, yous might get to use the special tool a few more than times. Repeat failures of the sensor are mutual and nosotros'll talk about this in the problems department beneath.
With that said, the beginning footstep is to remove the plastic embrace over the acme of the engine. Surprisingly, even this is a fight. The front of the cover just lifts off of two retaining posts. Nonetheless, the back of it gets hooked on the rear retaining clips, because it doesn't accept enough clearance above.
You'll have to stick your mitt in there and button down on the rear retainer while lifting up on the dorsum side of the engine comprehend. The next footstep becomes to disconnect the electrical connector. They use a lock tab to hold it in place. You simply pull the white lock tab up and it will snap to release. And so you can depress the connector lock and wiggled it loose from the sensor.
As for replacing the sensor it screws in the rear portion of the engine block into an oil gallery. A 6-inch extension fastened to a hinge head three/eight ratchet works perfectly for removing the Chevy engine oil pressure sending unit. Here is a three minute video that sums up the replacement procedure quite nicely.
Problems when Replacing the Oil Pressure Sensor
Chevy Oil Pressure Sensor Screen Filter
The primary problem when replacing the Chevy engine oil pressure level sensor is echo failure. This goes back to the root crusade of the issue. Sludge and debris finds its fashion inside of the old oil pressure switch.
This is when Chevy decided to install the filter screen for the 2007 model year. At present what happens is the screen becomes plugged with junk and engine oil never reaches the sensor.
Therefore, people that just replace the part without replacing the screen observe the repairs won't last long or don't work at all. This also leads to confusion that there is something else wrong with the auto.
On older Chevy engines that don't accept the screen repeat failure often comes from lack of engine maintenance. In some cases this is not the fault of the electric current possessor, but the previous one. A lack of engine oil changes can cause sludge deposits to form.
These can break loose and find their way into the input port of the replacement force per unit area sensor. If you have one brand sure you replace the screen forth with the switch.
You will need a modest pick to fish it out of the oil gallery in the engine cake. When you thread in the sensor it holds the new screen in place. With the low cost of the replacement office information technology doesn't seem like a good thought to make clean the old screen. In the next section I'll talk briefly virtually other issues I've found when trying to cut corners on this repair.
Replacement Chevy Oil Pressure level Sending Units
Whenever you lot take automobile parts that neglect in big numbers the aftermarket steps up to make cheaper solutions. They start mass-producing replacement parts and offering them at lower prices.
Unfortunately, I have seen several issues with these ultra cheap replacement Chevy engine oil pressure sensors. I've had a couple of them non work right out of the box. And this is non considering of the problems mentioned above in the repeat failure department.
With that said, allow me tell you most the worst-case scenario that I ran into. After replacing the oil pressure level sending unit with a role that cost $15, a disaster happened when I started the engine.
The plastic middle blew out of the office. When that happens the oil pressure gallery becomes open up to the temper. The corporeality of oil that sprays all over the engine compartment in such a short period of time will astonish yous.
The cleanup involved on both the vehicle and the piece of work area added a few more hours to this disaster. For this reason, if a client wants me to supercede the Chevy engine oil pressure sending unit I only employ a Delco function. Yet, I won't go this part from the dealership, because they want almost $100 for it. And while I'm on the subject of dealerships, when I priced this operation I got sticker shock.
The local Chevy dealership in my boondocks quoted me a price of parts and labor of $500 to replace the oil sending unit. With the amount of money you tin can save by doing it yourself, you tin afford to become a good replacement part, a new screen and the special tool that makes information technology easier to replace and still save.
Source: https://www.fixmyoldride.com/Chevy-engine-oil-pressure.html
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