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97 Ford F150 4.6L Engine Fault Codes P1151, P0115, P0141, P0155 - Diagnosis & Fixes

Model: 97 F150 Fault Code: P0115 Posted: 2006-11-06 17:25

My 1997 Ford F150 with a 4.6L engine is running smoothly and has reached 105,000 miles. After replacing the EGR valve and upstream O2 sensor, I'm now seeing these diagnostic trouble codes: P1151, P0115, P0141, and P0155. During the EGR replacement, I noticed damage to the pipe at the back end of the EGR unit. I'm unsure what this component is called or where to source a replacement—could this be contributing to the current issues? I suspect the engine may be running too lean. Based on my research, the Mass Airflow Sensor (MAF) might need cleaning. The MAF sensor measures incoming air volume and is typically located near the throttle body. I plan to clean it tonight using injector cleaner. Any insights or suggestions would be greatly appreciated—my vehicle inspection is approaching soon! Note: These codes are commonly linked to airflow, sensor faults, or intake system leaks.

Related fault codes
P0115P0141P0155P1151
Comments (6)
Anonymous 2006-11-07 08:42

You can find detailed information about the location and function of the Mass Airflow Sensor (MAF) on websites like alldata.com. A repair manual or mechanic's guidance will also confirm its position—this may be critical if your inspection is coming up soon.

Anonymous 2006-11-07 09:21

Thanks! I’ve already purchased injector cleaner and plan to clean the MAF sensor tonight (I found it). Does this cleaning address all the codes I’m seeing? I'm trying to avoid a shop visit due to cost, so any DIY advice would be very helpful.

Anonymous 2006-11-07 09:44

While MAF cleaning might help, intake gaskets are also potential culprits—especially if there's a leak in the intake manifold that causes air leaks and affects engine airflow.

Anonymous 2006-11-07 09:52

Got it—intake gasket is now on my list to inspect. Thanks again for the tip!

Anonymous 2006-11-07 10:46

Anonymous 2010-02-06 16:03

FYI: More detailed information about code P0115 can be found at http://www.obd-codes.com/p0115