SkidPalace
Member
Sorry for the long post, but please try to bear with me. My truck is my daily driver and I really need to get back on the road as quickly and cheaply as possible. Any help would be greatly appreciated.
I was headed back from the gym and my 2000 4Runner started hesitating.
The hesitation got progressively worse until I was forced to pull over and crawl 50 yards at a time. I could barely bring the engine to 1000 rpm before it would hesitate and sputter to a stall. I was able to resart and crawl about two miles, 50 yards a whack, all the way to the Advance Auto Parts store in my town with the hopes that I could have them scan the engine (it threw a CEL eventually).
So I finally get there 10 minutes before they close and the guy scans my truck and tells me:
P1130, mass airflow sensor malfunction.
P0171 System lean bank 1.
P0172 System rich bank 1.
So I say I have a K&N type oiled cloth air filter, so it probably is a fouled MAF and I should grab a can of MAF cleaner anyway. I spray the MAF from the air filter opening (I know, total waste of time) and no dice.
The really helpful guy comes out to me and let s me know that they have one MAF for my truck in stock and I might want to grab it before they close up. So I figure what the hell, I may as well get it. I have my girl meet me with my socket set and I swap out the MAF. Still no dice. I was able to at least get the truck to rev a bit higher by stabbing the gas pedal, all old skool carbureted style. By then the parts guy had finished closing up shop and came out to check my progress. He suggests that it sounds possibly like bad gas -which I had though of almost immediately - in fact, I had bought a bottle of fuel treatment with the MAF cleaner a half hour earlier. So I dump that in the tank. and run the truck a bit more.
I figure it is running enough to get me a mile and a half home. No sooner did I pull out of the shop did the thing fall back to the sputtering and stalling.
I eventually had to have my girlfriend tow me back with her CR-V.
Now the fun part...
I get home and fire up my toyota service manual system thingy and what do I see? P1130 is actually the A/F Sensor malfunction code. The freakin guy, as helpful as he was, mistook the MAF for the A/F sensors. I even said to the guy when he read the system lean and system rich codes that it sounded more like an a/f or an o2 sensor issue. Oh well.
So now I am even more confused. Can an A/F sensor cause the whole engine to shut down? I actually had one go bad 40K miles ago throwing the same P1130 code and the truck drove just fine. Does this sound right?
Sorry for the LOOOOONG post.
Advice please? I am dreading having to replace the a/f sensor. My studs are rusted badly. The friggin dealer replaced the last one to the tune of $460 - don't even get me started :redbrick:. I'll be changing this one assuming it is actually the culprit.
I was headed back from the gym and my 2000 4Runner started hesitating.
The hesitation got progressively worse until I was forced to pull over and crawl 50 yards at a time. I could barely bring the engine to 1000 rpm before it would hesitate and sputter to a stall. I was able to resart and crawl about two miles, 50 yards a whack, all the way to the Advance Auto Parts store in my town with the hopes that I could have them scan the engine (it threw a CEL eventually).
So I finally get there 10 minutes before they close and the guy scans my truck and tells me:
P1130, mass airflow sensor malfunction.
P0171 System lean bank 1.
P0172 System rich bank 1.
So I say I have a K&N type oiled cloth air filter, so it probably is a fouled MAF and I should grab a can of MAF cleaner anyway. I spray the MAF from the air filter opening (I know, total waste of time) and no dice.
The really helpful guy comes out to me and let s me know that they have one MAF for my truck in stock and I might want to grab it before they close up. So I figure what the hell, I may as well get it. I have my girl meet me with my socket set and I swap out the MAF. Still no dice. I was able to at least get the truck to rev a bit higher by stabbing the gas pedal, all old skool carbureted style. By then the parts guy had finished closing up shop and came out to check my progress. He suggests that it sounds possibly like bad gas -which I had though of almost immediately - in fact, I had bought a bottle of fuel treatment with the MAF cleaner a half hour earlier. So I dump that in the tank. and run the truck a bit more.
I figure it is running enough to get me a mile and a half home. No sooner did I pull out of the shop did the thing fall back to the sputtering and stalling.
I eventually had to have my girlfriend tow me back with her CR-V.
Now the fun part...
I get home and fire up my toyota service manual system thingy and what do I see? P1130 is actually the A/F Sensor malfunction code. The freakin guy, as helpful as he was, mistook the MAF for the A/F sensors. I even said to the guy when he read the system lean and system rich codes that it sounded more like an a/f or an o2 sensor issue. Oh well.
So now I am even more confused. Can an A/F sensor cause the whole engine to shut down? I actually had one go bad 40K miles ago throwing the same P1130 code and the truck drove just fine. Does this sound right?
Sorry for the LOOOOONG post.
Advice please? I am dreading having to replace the a/f sensor. My studs are rusted badly. The friggin dealer replaced the last one to the tune of $460 - don't even get me started :redbrick:. I'll be changing this one assuming it is actually the culprit.
