Question about Cars & Trucks
Your fuel pump power is controlled through the oil pressure switch, and if it is showing low pressure due to a leaking/defective oil pressure switch, it may shut off the fuel pump. Oil pressure switch failures are a common source for oil leaks. There could, and probably are, other issues going on. You never mentioned if the "check engine" light was on, and if it is, a scan would definitely be in order to determine the true cause of your problem
If it is not on, GM fuel pump failures are very common, as well as the vehicle security system my be having a programming issue. I would start by having the engine scanned (most Autozone locations do this for no charge) Good luck!
Posted on Nov 08, 2014
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Posted on Jan 02, 2017
SOURCE: Oil pressure switch
There are no recalls that pertain to oil pressure switches on any Toyota vehicle. I would like to know exactly what part of the switch popped out, the entire switch, or just a part of it. What probably happened is somebody banged into the switch when changing the oil, and compromised the integrity of the switch. The oil pumping out issue: The Oil Pressure Switch is on the first oil galley out of the oil pump. This means that the switch port gets full oil pressure while the engine is running. This is around 30 PSI. With the switch, or any part of it missing, it would not take too long to pump out the 3.9 quarts of oil in the pan.
Posted on Jan 10, 2009
This is an idication of a severe oil leak. Check the oil level in your engine to see if there is any in it. Add to the full mark and return to the oil change shop and ask them to see where the leak is. Do not operate without oil. Severe engine damage will occur. Hope this helps Moe
Posted on Apr 28, 2009
po455 is Probable Cause[s]
1. Defective, loose or missing fuel cap
2. EVAP canister broke, hose cracked or not connected
3. Purge or vent solenoid defective
4 . Vacuum leak at engine po121 code po121 means Throttle Position Sensor/Switch A Circuit Range/Performance Problem . it is usually indicative of a faulty throttle position sensor or faulty wiring harness in the engine bay.
Posted on Feb 27, 2010
If the light is only turning on during acceleration or deceleration and then goes off, this is normal. If the light is constant, and you are sure you have oil that is up to the "full" or "max" level on the dipstick while hot, then it might point to a faulty oil pump or worn gaskets that will no longer prevent the oil from staying in place in the engine. Is this light accompanied by a check engine light. If so what is the code. You may also have a faulty oil sensor. Hope this helps
Posted on Apr 09, 2010
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