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#Chevy cobalt mass air flow sensor problems how to
#Chevy cobalt mass air flow sensor problems cracked
#Chevy cobalt mass air flow sensor problems code
#Chevy cobalt mass air flow sensor problems crack

The amount of air entering the rubber duct through this crack is not measured by the sensor, therefore the airflow sensor reads a much lower amount of air flow than actually is.

#Chevy cobalt mass air flow sensor problems cracked

In the top photo, you can see a cracked intake rubber duct (snorkel). A vacuum leak allows "unmetered air" to enter the engine by-passing the airflow sensor.Ĭracked intake duct Debris inside the sensor

#Chevy cobalt mass air flow sensor problems code

Often the code P0101 is caused by a vacuum leaks. Read more about symptoms of a clogged catalytic converter below.Įxamples of what can cause the code P0101 To diagnose this issue, exhaust back pressure or the engine vacuum must be checked. Chevy Tahoe, Silverado) the code P0101 can be caused by a clogged catalytic converter. A faulty airflow sensor is very common in many cars (e.g. Read more about testing a mass air flow sensor. 1000, 2000, 3000) must be compared to the specifications or to the readings of a known good sensor. The airflow sensor readings at different rpms (e.g. The mass air flow can be tested with a scan tool that displays the live data. The sensor reference voltage and ground must be checked. The mass air flow sensor connector must be inspected for loose pins or corrosion. Other possible sources of vacuum leaks must be inspected. This problem is common in many European vehicles, e.g. The intake boot must be inspected for cracks and rips. Volkswagen) a metal mesh intake screen installed before the air filter can be plugged up too. If the problem started soon after the air filter was replaced, the air filter installation as well as the air flow sensor must be checked. See the photo of a clogged up mass airflow sensor below. Sometimes a foreign object like a leaf or dust can clog-up the airflow sensor measuring element (hot wire) causing this code. Electrical problems with the MAF sensor connector or wiringįirst the mass air flow sensor must be checked and cleaned if dirty. Bad or dirty manifold absolute pressure sensor (MAP) Clogged-up catalytic converter or restricted exhaust The mass air flow sensor element contaminated by excess oil from an oil-soaked air filter Clogged up or improperly installed air filter Vacuum leaks (stuck open PCV valve, leaking intake gaskets, etc.) Cracked, ripped or disconnected intake boot (snorkel) Dirty, obstructed or faulty mass air flow sensor (MAF)

The most common causes of the code P0101 are: For the same reason, the automatic transmission shifting pattern may also change. Common symptoms include:īecause the mass air flow sensor readings are used to calculate the engine load, the traction control system may stop working and the traction control warning light might also come on on the dash. If the sensor doesn't measure the air flow correctly, the fuel injection system won't work properly. The engine computer uses the mass air flow sensor signal to determine how much fuel to inject. In most cases, this code is not very difficult to diagnose. The OBD-II code P0101 is set when the signal from the mass air flow sensor is out of expected range, or in other words, the MAF sensor doesn't work properly. The mass airflow sensor (MAF) measures the amount of air entering the engine. Signs of automatic transmission problems.

#Chevy cobalt mass air flow sensor problems how to

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Condition known as "porous block" GM refuses to acknowledge problem. 1st time under warranty, 2nd time was on my own bill but I upgraded to an entirely new upgraded head, so the problem will NOT return.Įngine was leaking coolant into oil pan gradually worsening until 1gal was lost in 5 minutes of runtime. new part installed, no recurring problems. Threw 9 codes at the dealer they determined ECM Car threw a CEL and later, after 10 kms it started to sputter and rev at unusual idle levels and it was also in "limp" mode. Don't know why or how, probably just defective from the factory. Only thing we could find was a problem with the original engine having hairline cracks in the head and block that allowed small amounts of antifreeze into the oil, turning it to sludge.Įxhaust valve actuator failed. WTF Replaced engine due to extremely thick oil. Had dealer replace the throttle body sensor.įuel system Fuel pump was bad and pumping fuel into the oil Low Coolant light keeps illuminating, no sign of leaks anywhere.

Replaced intake and exhaust cam sensors my self based on codes. Engine light had been on for about a year.