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All modern vehicles are equipped with an onboard computer diagnostic system that constantly monitors the vehicle’s major operating systems. This diagnostic system communicates with the engine and transmission and adjusts performance according to set manufacturer parameters. When any of these set parameters are found outside of the acceptable range, the check engine light becomes lit.


Perform free diagnostic code retrieval
Interpret and analyze the diagnostic fault code that registers the nature of the issue
Locate specific problem
Discuss diagnostic and repair options if needed
Check smog-related components


An oxygen sensor monitors the exhaust for unburned oxygen, which indicates engine efficacy and the proper air-to-fuel ratio. If you have a faulty sensor, it will not provide the correct data to the onboard computer. The majority of vehicles have two to four sensors. Deterioration of the precious metals inside the oxygen sensor affects the sensors’ ability to give an accurate reading. If you put off getting an oxygen sensor replaced, it will eventually damage your catalytic converter, which can be very costly to replace.


This part directs the computer in your vehicle to add the correct amount of fuel based on the air that is coming through the engine. When a mass airflow sensor starts to fail, the car will stall, it will idle poorly, the emissions will go up, and your gas mileage will go down. An air filter that has never been replaced or improperly installed can sometimes be the culprit when it comes to a faulty mass airflow sensor. Have your air filter checked and replaced on a yearly basis. While it is possible to drive for months with a malfunctioning mass airflow sensor, it’s not a good idea. Your gas mileage will drop and the car will start stalling frequently.

If you would like a quote from one of the stores listed below please click the appropiate link below:

Jiffy Lube NE 33rd & Sandy - 3240 NE Sandy Blvd Portland OR 97232

Jiffy Lube NE 143rd & Division - 14305 SE Division St Portland OR 97236

Jiffy Lube NE 82nd & Banfield - 1237 NE 82nd Ave Portland OR 97220

Jiffy Lube NE 111th Weidler - 1110 NE Weidler St Portland OR 97220

Jiffy Lube SE 82nd & Division - 2525 SE 82nd Ave Portland OR 97266

Jiffy Lube Oregon City - 13863 S Beavercreek Rd Oregon City OR 97045

Jiffy Lube King City - 15410 SW Pacific Highway Tigard OR 97224

Jiffy Lube Aloha - 20745 SW Tualatin Valley Hwy Beaverton OR 97006

If possible please include the Vehicle Year, Make, Model, Engine Size. This will help us provide an accurate quote. Please include your phone number for additional questions. Our goal is to call you back within 3 hours.

Diagnostic Service

PLEASE NOTE: PLEASE NOTE: The Services listed above are offered only at the following locations: 111th NE Weidler St (11110 NE Weidler St), Banfield NE 82nd Ave (1237 NE 82nd Ave), NE 33rd Sandy Blvd (3240 NE Sandy Blvd), Oregon City (13863 S Beavercreek Rd), NE 143rd Division (14305 SE Division St), 82nd & Division (2525 SE 82nd Ave), Aloha/Beaverton (20745 SW Tualatin Valley Hwy), King City (15410 SW Pacific Hwy)