Common solutions to p0300, p0101, and p0131 check engine codes?

118, replace the coolant sensor. 440 is a small leak for EVAP. Could be as simple as replace the gas cap. 101 could be the MAF sensor or wiring to it. 300 is random misfire, needs to be on a scanner, Could be related to MAF sensor. 4401 is not a valid engine code.

Here's a link for code P0101, http://repairpal.com/OBD-II-Code-P0101 Here's the link for code P 0300. P0300 OBD II Trouble Code If you fix code P0101,the other code will be fixed.Here's a new part. http://www.autozone.com/engine-management/mass-air-flow-sensor/cardone-reman-mass-air-flow-sensor/nissan-datsun/sentra/2006/4-cylinders-c-1-8l-sfi-dohc/946979_0_0

code p0131 refers to heated oxygen sensor (HO2S) bank 1 low voltage. possible causes ---Exhaust leak wiring short to ground HO2S ans ecm I would check the wires are not touching the exhaust then replace the sensor with a genuine one as the settings may be different on an after market one giving a false code
.Code p0300 refers to random / multiple cylinder/s --- misfire detected. Possible causes include Spark plug/s--- HT leads---injectors--- ignition coils----low compression and wiring

Code P0131 is your Oxygen sensor that needs to be replaced. This could cause the other code which is P0300-Random Multiple Misfire although this is usually caused by one of two other sensors. Try replacing the Oxygen sensor first and reset the computer and see if you still get the P0300 code afterward. If you do then you will have to have the Crank Position sensor and the Cam Position sensor tested. Now, being a 1995 the P0300 code could be caused by the timing belt if it is worn and about to go out but you need to address the O2 Sensor issue first then see if the other code comes up again as it is common in that year for the O2 Sensor to fault and have a second or third code thrown at the same time that is essentially a ghost code as nothing is wrong in that area.

did you check the fuse for the O2 heater circuit? Also what year,make,model and engine size do you have?

Pull the vac hose going to fuel pressure regulator and see if it has fuel in it. If it does replace it. Just fixed one with multiple misfire codes.

Check your catalytic converter, good chance that it has broken apart and is blocking exhaust flow. Common Chevy 4.3L Issue.

check your wiring make sure it is in the correct firing sequence! p0300 means misfire! p0131 means O2 sensor is not working properly.

For p0300 ,p0240 on chevy tahoe 00- 06 check a wire going along with the battery ground to the engine block thre should be a high resistence on the small wire ,it gets corrode over time ,it should be located on underneath of the driver side engine,

make sure you have ngk or ac delco iridium plugs installed. Also common problem on the 2.2L ecotec is the cat plugging. Easy check is to remove the front o2 sensor (very easy 22mm wrench) and start the car and rev it. If it revs freely now and does not bog the cat is plugged. They are covered fed. emissions warranty 8yr 80k, all gm dealers stock the cats for the 2.2 ecotec.