Getting the correct tools will go a long way in making the job as easy as possible. The hardest part to replacing the sending unit is the location the which makes it difficult to replace.
#P0102 chevy silverado code
The most common cause of a P0521 error code is a bad oil pressure sending unit but could also be a bad wire, blown fuses, faulty oil pump, and possibly a bad ECM. The filter can be removed by using a bolt to catch it and pull it out.įixing a Chevrolet 1500 Silverado, Sierra, or Tahoe with a P0521 error code is reasonably easy to do. Other parts do not need to be removed if you are good at working in tight spots.Īfter the sending unit is removed, a filter is located inside the hole, which can also be replaced. Some mechanics will remove parts that are in the way while others do not. When looking behind the engine from the driver’s side, it will be at the back. The oil sending unit is located between the engine block and the firewall. Replacing the oil sending unit is straightforward but does require certain tools.Īn oil pressure switch socket is highly recommended since they are low cost and is the right tool for the job.Įxample 1-1/16 Oil Pressure Switch Socket on AmazonĪ deep well 1-1/16″ socket may work but will make the job much more difficult as they do not hold the switch tightly.Īlso, a ratchet with a swivel head is highly recommended to get the job done much easier as the unit is in a hard-to-reach place.
#P0102 chevy silverado how to
How To Fix a Chevy P0521 OBDII Code By Replacing Oil Sending Unit Oil Pressure Sensor Switch Sending Unit 12677836 D1846A 12616646 Compatible with Chevy Silverado Suburban Tahoe GMC Yukon Impala Pontiac G8 12573107,12562230,s4202, ps340, pt1825, PS308 Next test or replace the oil sending unit/switch which is often the cause of a P0521 code.Ī new oil sending unit/switch is a low-cost item that can be bought at an auto parts store or online on Amazon or eBay.Įxample Chevrolet Oil Sending Unit/Switch on Amazon How To Diagnose a P0521 OBDII Codeįirst check the oil and be sure it is at the correct level and not dirty. Other possible cause include the wiring, blown fuses, faulty oil pump, and possibly a bad ECM. Low or dirty oil can cause issues so be sure to check the oil level. The usual cause is a bad oil sending unit but low oil or bad oil pump can also cause an issue. Symptoms include the engine light being on and the oil pressure gauge either very low or high. If the sending unit goes bad, the EMC will see low oil pressure and send out a warning with the engine light coming on. The oil sending unit/switch is located on the engine block and sends information to the onboard computer (ECM) for oil pressure. Some scan tools will also give an “Engine Oil Pressure Sensor/Switch Range/Performance”.
What Is a Chevy P0521 OBDII Code?Ī P0521 is an “Engine Oil Pressure Sensor Range Performance” OBDII error code. The most common cause is the oil pressure sending unit/switch, which usually needs to be replaced. This also includes almost any Chevy engine type, including the 4.3L, 5.3L, and 6.2L. If you have a Chevrolet 1500 Silverado, Sierra, or Tahoe and get a P0521 error code, it is usually a straightforward fix.
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