New codes- I need help deciphering!

[cRaZySHO.]

I just replaced my ACT sensor and my TPS. But my code 157- Mass air flow signal too weak, still comes up. My father and I have not been able to fix this one. I was hoping maybe one of you SHO guru's out there could help me solve this one. The only other thing I can think of, is that my wiring harness for the MAF is burnt, or going bad. I also thought maybe the sensor filament is dirty. Any help on this one? Thanx guys.

 

[naval-avi8or]

Hers some code/troubles hooting info.

DC10 - Check For Intermittent Sensor

Continuous Memory Diagnostic Trouble Code (DTC) 157 indicates the Mass Air Flow (MAF) sensor signal went below 0.4 volt sometime during the last 80 warm-up cycles.

Possible causes:

Poor continuity in MAF sensor harness or connectors.
Intermittent open or short in MAF sensor or harness.
Damaged MAF sensor.
Idle Air Control (IAC) system failure (at closed throttle position).
Clear continuous memory. See: Quick Test (Extracting and Clearing Codes)\Clearing Codes
Start engine and idle for 5 to 10 minutes.
Vehicle in "PARK" or "NEUTRAL".
Suddenly goose (greater than a half second) the throttle, approaching 1500 rpm.
Allow to return to idle.
Then, goose the throttle again, approaching 1500 rpm.
Key "ON", engine "OFF".
Run Self-Test to observe Continuous Memory DTCs.
Is Continuous Memory DTC 157 present?
Yes -- Go to DC13. See: DC13 - Air Leak at MAF Sensor
No -- Go to DC11. See: DC11 - Monitor MAF Circuit Under Simulated Road Shock

 

[cRaZySHO.]

Thanx Av8or. That last part answered my question, I do get the continous memory code. I will check 2morrow for a leak.

 

[AutoSHO]

Mine had a problem with the MAF which manifested itself as a driveability problem at lower RPM's and limited top end power, especially during high throttle openings. The sensore itself had gone bad, but if you have a K&N filter, chances are the oil has fouled the sensor. Just use a little electrical contact cleaner, or be very careful and use carb/choke cleaner. Good luck, and be very careful! If you need a new MAF, I have a stock setup, airbox + MAF + tube (55mm MAF) that I could sell to you. Good Luck!

Also, I wanted to say that your wheels look Awesome! I like the look of the Volvo wheels. How wide are they? Could they fit more than a 205 series tire? Thanks a lot!

<small>[ May 17, 2002, 12:41 AM: Message edited by: AutoSHO ]</small>