Got a code 33 yesterday. Is there anyway to test the MAF sensor or relay?

Or is it probably just toast?

Thanks,
Troy

 

save target as

http://www.moates.net/files/6)%20Mis...s/TPIcodes.pdf

 

for reference its on page 20 and it will help alot if u knew how to use the chart

but anyways this is what i picked up from a quick search
CODE 33

Trouble Code 33 indicates that the Mass Air Flow (MAF) sensor is reporting more air is entering the engine than makes sense based on RPM and TPS. The MAF sensor produces a frequency output; around 30 Hz at idle to 150 Hz under acceleration. The frequency varies proportionally to airflow. The ECM monitors the frequency and thus determines airflow into the engine. Typical idle MAF is 5 to 7 grams per second.

The conditions for setting this code are:

no Code 21 or 22 (TPS Error) present, and
the air flow reported is > 40 grams per second, and
TPS indicates < 10% throttle position, and
the engine speed is 1400 RPM or less, and
the above conditions exist for over 5 seconds.



Typical causes for this code include:

1) Faulty MAF-to-ECM connection
2) Exceedingly noisy spark plug wires
3) Poor routing of MAF harness (i.e. near coil packs)
4) Maladjusted TPS sensor
5) Defective MAF sensor
6) Defective ECM

Incorrect voltage level at
terminal C on the MAF sensor. Should be 0.5 volts at idle, 4.7 volts at wide open throttle (WOT)


Faulty or loose wiring and/or connections at the MAF sensor.


Faulty MAF sensor.