P0102

Description
MAF SENSOR CIRCUIT LOW FREQUENCY

Mass Airflow (MAF) sensor measures amount of air entering
engine during a given time. PCM uses MAF sensor information for fuel
delivery calculations. MAF sensor readings during acceleration are
much higher than those during deceleration or idle.
PCM calculates what MAF sensor reading should be received
from sensor under certain conditions using engine speed (RPM),
throttle position, and altitude parameters. When these test conditions
are met, PCM will compare its calculated MAF value to actual value
received from sensor.
Symptoms
You may notice a decrease in power or some sluggishness.

Causes

• MAF may be disconnected
• MAF sensor may be damaged

Solutions

The simplest thing to do is to reset the code and see if it comes back.

• Make sure the MAF is plugged in, check for corrosion on plug.
• Check for any vacuum leaks near the MAF sensor.
• Inspect the MAF, is the thin wire broken? if so, replace
• Clean the MAF
• Test the MAF
• Ensure MAF sensor harness is not routed too close to high voltage
  wires, such as spark plug cables, ignition coils or other high
  voltage components. Reroute harness if necessary.
• Replace the MAF sensor.