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2002 saturn vue injector issues5/7/2023 ![]() ![]() Instead, the air mass flow rate is calculated by the control unit using the data from the MAP sensor. Note (MAP Sensor): If you can’t find MAF sensor in your vehicle, it is possible your vehicle may not have one, especially if its an older vehicle. But this should only be done after an extensive analysis as the MAF sensor may not be responsible for the symptoms of poor acceleration in your Vue. In case of doubt, the sensor may have to be replaced. However, it can happen that there are no error codes. If you see P0100, P0101, P0102, P0103 or P0104 code in the OBD2 scanner, it indicates a problem with the mass air flow sensor. Reading out the fault codes using a diagnostic device is relatively reliable. ![]() How to check if the MAF sensor is bad in Saturn Vue? In rare cases, the MAF sensor can also be damaged by oil vapors flowing back out of the crankcase ventilation after the engine has been switched off. When driving fast in heavy rain, water can occasionally pass through the air filter, which can severely impair the function of the MAF sensor. However, the sensor can also malfunction earlier. With a noticeable loss of performance and high mileage, a defective MAF sensor should definitely be considered. As the mileage increases on your Vue, it can happen that increasingly inaccurate values are sent to the engine control unit. The mass air flow sensor is a wearing part. This can cause the engine warning light to illuminate in the instrument cluster and the fault can be read out by a diagnostic device. The engine runs too “lean” or too “rich”. The optimal amount of fuel can no longer be calculated which results in either too little or too much fuel injected into the combustion chambers. If the MAF sensor is defective or dirty, it does not send correct measured values to the control unit of Vue. What happens when MAF sensor malfunctions in Saturn Vue? It is not only important for power delivery in your Vue, but also for the lowest possible pollutant emissions. The mass air flow sensor is part of the engine’s intake system and is located between the air filter box and the throttle valve. Dirty or faulty mass air flow sensor (MAF)ĭefective or dirty mass air flow sensor (MAF) in your Saturn Vue can result in loss of power, uneven engine running, erratic idling, misfires, poor exhaust emission values including black smoke. So this is the first thing you should check. Replacing the filter on your Vue takes a few minutes and does not require any special knowledge. ![]() In the worst case, the engine can stall if the air filter is extremely clogged. This ultimately also increases fuel consumption. Once I replaced it, all was well.If the air filter is dirty in your Saturn Vue, it can have a negative effect on the performance of the engine, as less air passes through the dirty filter which suffocates the engine. I found the solution through extensive web searches. In my case, my manual only had a passing reference to the crank sensor and no diagnostic procedure to test it or even lead me to it. A good repair manual with a flow chart is probably the best procedure to follow. Bad coil, loose wires, even the crank sensor are all suspect. Spark diagnosis begins with first determining the condition, then finding the cause. Lastly on the fuel side, check t see if the injectors are getting a signal to fire, usually done with something called a noid light, I believe. Check fuel pressures with a fuel pressure test guage: Low fuel pressure indicates a bad fuel pump or a bad fuel presssure regulator. They are cheap and not too hard to replace.Ī full diagnostic approach would be to determine if it was a fuel or a spark problem. I you are looking to throw a part at it, start with the crank sensor. Non-start situations basically boil down to two things: No Fuel, or no spark. changed out the oil with mobile1 extended performance, changed transmission fluid. Replaced my plugs with the iridium 'honeys' marked improvement in starting, acceleration, smoothnes, noise, and gas mileage to the value of + 3.0%. with the hands of a surgeon, remove the ignition assembly, and by golly ye shall see your reward. lift the intake out, look for plug covers, fore and aft, ignition assembly lays atop each row of three plugs. once you have those out, disconnect all the wiring, carefully. these star bolts are under the rectangular plastic plate atop the intake. common tools plus a 1/4 socket, with 8 inch extension to hold a #10 star bit. to gain access to the plugs, both fore and aft, you must remove, in short, everything near to, associated with, the air intake system. if you have the time and patience it's straight forward common sense was most helpful. Just completed a plug removal and install on my '02 awd v6. ![]()
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