2002 chevy impala mass air flow sensor problems

Have any questions about our How To DIY tutorial? Leave us a message below and let us know.Delphi Mass Air Flow Sensor Mass Air Flow Sensor Symptoms Use a scan tool to properly clear any stored check engine trouble codes.

If you’ve tested your air meter and found these wires to check out and your MAF OBDII trouble code is still present, you will need a Impala MAF sensor replacement. WIRE 5 is a TAN wire with a BLACK stripe in it, and this is the ground circuit for your Impala IAT sensor. There should be a 5 volt signal here with your key turned to the “ON” position. WIRE 4 is a TAN wire, which represents the Air Temperature Sensor Circuit. These changes provide the engine computer with the information it needs to adjust the fuel curves accordingly. This part of your mass air flow sensor uses a 5 volt signal to measure the temperature of the incoming air.Īs the air temperature changes the voltage back to your PCM changes.

Now that you have tested your Impala MAF Sensor, we’ll test the IAT sensor for proper operation. The ground signal in your mass air flow sensor belongs to WIRE 3 which is a BLACK wire with a WHITE stripe in it. PIN 2 is a PINK wire with a BLACK stripe in it, and once you’ve confirmed a power signal move onto to the low reference ground signal. This wire should have a 10-12 volt DC signal.

Turn your Impala key to the “ON” position and then probe the front of wire number 2 for power. Remember you are testing on the ENGINE side of the harness. Take your digital multimeter and you’ll be probing the Chevy mass air flow meter wiring connector. If you notice any of these symptoms, check your OBDII stored engine code using a scan tool. When this mass air flow vane meter goes bad, you can have a variety of issues pop up in your Impala.

2002 chevy impala mass air flow sensor problems