Check Engine Light - Mass Airflow Sensor

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Aug 28, 2003 | 08:59 PM

dmo00

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Joined: Aug 2003

Posts: 4

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From: Indiana

Check Engine Light - Mass Airflow Sensor

Hello,

Could someone please help. My 2001 SuperCrew (5.4 & 4X4), only 500 miles after the warranty expired, had its Check Engine light turn on. I had it checked at AutoZone and a Mechanic and they both confirmed the only code to be a low voltage reading on the MAF/VAF Sensor.

The mechanic cleaned the sensor but it had no effect. Since his recommendation was to change the MAF Sensor, I ordered a Granatelli sensor and a K&N filter and put them on myself.

It did not work. I think the truck is peppier but the light is still on. I did leave the battery unhooked for a while to reset the system. The truck hesitates on depressing the accelerator but runs.

Any ideas PLEASE?

Thanks!

Aug 29, 2003 | 12:05 AM

Racerguy

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Joined: Aug 2002

Posts: 12,679

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From: BC, Canada

Check Engine Light - Mass Airflow Sensor

Hi dmo00 and welcome to FTE

Do you know what the code number was that was retrieved? It will be a P something. If you can post that it would be helpful.

Aug 29, 2003 | 05:21 PM

dmo00

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Joined: Aug 2003

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From: Indiana

Check Engine Light - Mass Airflow Sensor

P0102 - The same as before MAF/VAF Sensor Circuit Voltage Low

Aug 29, 2003 | 06:30 PM

AegisSailor

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Joined: Sep 2002

Posts: 772

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From: White Sands, NM

Check Engine Light - Mass Airflow Sensor

P0102 Possible Causes:

- MAF sensor disconnected
- MAF circuit open to PCM
- VPWR open to MAF sensor
- PWR GND open to MAF sensor
- MAF RTN circuit open to PCM
- MAF circuit shorted to GND
- Intake air leak (near MAF sensor)
- A closed throttle indication [throttle position (TP) sensor system]
- Damaged MAF sensor
- Damaged PCM

Aug 29, 2003 | 11:05 PM

dmo00

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Joined: Aug 2003

Posts: 4

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From: Indiana

Check Engine Light - Mass Airflow Sensor

What do these acronyms stand for?

PCM, VPWR

I first noticed this when I had to depress the accelerator about 1" before the truck reacted (no smooth starts from a light). Could this point to the TPS? Where is it located if it does?

Thanks in advance - this is helping.