Q: Displacement on demand not working.

asked by on July 19, 2016

Check engine light appeared. My obd reader says to check oil pressure switch. I cleared the engine light and now the displacement on demand will not go from 8 to 4 cylinders . Could this be a faulty switch? The oil level is ok. Thanks-Joe

My car has 65000 miles.
My car has an automatic transmission.

Oil Pressure Sensor Replacement $104.83 - $442.63 Get a Quote
Check Engine Light is on Inspection $94.99 - $114.99 Get a Quote

The 8 to 4 system will automatically default to 8 cylinders if there is any problem that the ECM determines through its programming that it should disable the system. If you are having problems with the oil pressure sensor, it may be the cause of the problem. The Check Engine Light is a good indicator of where the problem may be occurring. I recommend having a certified mechanic, such as one from YourMechanic, come to your car’s location to diagnose the Check Engine Light and make the necessary repairs.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do I use the daytime running lights?
The daytime running lights are mild headlights that can be used when driving your vehicle during the daytime. The daytime running lights will automatically turn on when the headlights are not turned on, the car is running, and the shifter...
Check Engine light revealed thermostat problem
Sounds like you have a code P0128. The computer monitors the warm up cycle of your engine -- it looks for your coolant temperature to rise to a certain level within a given time frame. The computer does this because...
hood safety latch won't open
Hello there, this is not an uncommon occurrence as vehicles age and the hood has been opened many times. The cable can become weak at the hood latch, or the pull tab on the hood latch has become disconnected and...
My coolant fans is not running when ac is turned on.
With A/C systems, it is important to know in what order things turn on and off. From your description, it sounds as though the compressor clutch is only engaging for a short period of time. This is usually due to...
very loud noise when i turn left or right but drives great straight. i just replaces axles and cv joints and tire rods ok.
There are several possible possibilities, as these are kind of noisy cars. Failed strut mounts and bearings are a common source of noise when turning. Wheel bearings (https://www.yourmechanic.com/services/wheel-bearings-replacement) also make noise while turning when they fail as well. It's also...
when traveling a long distance my car will not accelerate over 60 my old Nissan did this as well. Is this a known issue?
Hello. Your particular model of Altima is equipped with a CVT transmission that will automatically put itself in a safe mode if the transmission fluid level (https://www.yourmechanic.com/services/transmission-fluid-service) reaches too high of a temperature. If the fluid temperature climbs too high,...
My wheels lock up when I try to go in reverse.
Hello. If your transmission is no longer going in reverse, then there is likely an issue with the transmission. It may be possible that one of the shift solenoids or sensors that controls the shifting of the transmission has failed...
Location of blinker flasher
When you look at the fuse block under the left side of the dash you will see a big flasher. This is the flasher for the turn signals. The hazard flasher is on the back side of the fuse box...
Can missing wheel studs affect 4wd?
In most situations, I can't think of a situation where missing wheel studs will prevent you from engaging the four wheel drive system. If a piece of a broken wheel stud falls behind the flange, it can cause the wheel...

Related articles

P3427 OBD-II Trouble Code: Cylinder 4 Deactivation/Intake Valve Control Circuit Low
What What the P3427 code means When starting, and when the vehicle is operating under heavy weight, the engine will operate in V8 mode. But when driving conditions are light, the engine will deactivate 4 of the 8 cylinders, thereby...
P000A OBD-II Trouble Code: "A" Camshaft Position Slow Response Bank 1
P000A code definition This code is known as ‘A’ Camshaft Position Slow Response Bank 1. You may also see a 00010 fault...
P0376 OBD-II Trouble Code: Timing Reference High Resolution Signal B Too Many Pulses
P0376 code means there is an irregularity with the high resolution timing reference signal coming from the PCM requiring urgent attention.