P1130 CEL code
#17
04-04-2009 | 12:58 PM
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From: Jacksonville
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No prob- glad it worked out well for you. It's an easy mistake to make. I recently had a guy come in from Georgia for MAF/trim codes and the shop up there that did his CAI had installed the MAF backwards too.
#18
07-12-2010 | 06:47 PM
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From: Mill Creek, WA
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So, once again I am having the same issue arise with my car and this time my tabs are due and I have to pass emmisions. Does anyone happen to know what some possible causes for this are, other that my MAF is dirty from my sweet intake. The only mods to my car are the obvious k&n CAI and fabspeed muffler bypass.
#20
07-13-2010 | 08:10 AM
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THe only fault present is the P1130. The fault has been on this time for about 30 miles. It has come on a few times and each time I disconnect that battery and clean the MAF. Each time the same CEL keeps coming on.
#21
07-13-2010 | 08:29 AM
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If a fuel trim or other emissions relavant fault is present, it will take at least 30 miles for the ecu to test all of it's emissions control systems. HOWEVER, i would recomend that you clear the fault and drive it through at least (2) drive cycles which is at least 60 miles and preferably during 2 cold though hot (operating temp) drives. I would go a bit over 60 miles, then re-check the faults. This will tell you if one or two banks are affected. If you drive it through 2 full drive cycles and the ecu registers an addional fault for bank 1 (P1128) this is important to know for proper diagnosis. If only P1130 returns, it is unlikely the MAF is affected as a MAF is before both banks and will affect both equally but sometimes the fuel trimming for the second bank will take an extra drive cycle to register. If only one bank is affected, it has to be an air leakage somewhere between the bank 2 intake manifold half and the front oxgen sensor for bank 2. Possibly a minor exhaust leakage at the manifold gasket or cracking exhaust runner at the header for that bank or a vacumeline or fitting from the intake manifold half.
#22
07-13-2010 | 10:39 AM
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From: Mill Creek, WA
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If a fuel trim or other emissions relavant fault is present, it will take at least 30 miles for the ecu to test all of it's emissions control systems. HOWEVER, i would recomend that you clear the fault and drive it through at least (2) drive cycles which is at least 60 miles and preferably during 2 cold though hot (operating temp) drives. I would go a bit over 60 miles, then re-check the faults. This will tell you if one or two banks are affected. If you drive it through 2 full drive cycles and the ecu registers an addional fault for bank 1 (P1128) this is important to know for proper diagnosis. If only P1130 returns, it is unlikely the MAF is affected as a MAF is before both banks and will affect both equally but sometimes the fuel trimming for the second bank will take an extra drive cycle to register. If only one bank is affected, it has to be an air leakage somewhere between the bank 2 intake manifold half and the front oxgen sensor for bank 2. Possibly a minor exhaust leakage at the manifold gasket or cracking exhaust runner at the header for that bank or a vacumeline or fitting from the intake manifold half.
#23
07-13-2010 | 10:56 AM
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Again, if after 60-70 miles from when you have cleared codes last, you still only get one fault code (p1130), then you have only one bank affected and that would almost certainly be and air leakage before the intake ports or after the exhaust ports but before the front O2 sensor. That is called unmetered air (air not metered/accounted for by the MAF).
You need to smoke test the intake and exhaust to verify leakages. If you have a known exhaust leakage (exhaust noise) or can see black contrails of carbon around the exhaust header flange or header pipes where they are welded to the flange plate, that would be a good visual indicator.
I suppose the only other time you could have one bank throwing a lean code also would be a coolant leak into the combustion chamber. Typically that will result in some white, sweet smelling smoke at start up and while driving unless it is a VERY small leak that only sucks enough to throw off the AFR via the oxygen content of the coolant mixture. This i think is probably pretty unlikely unless you've had some other issues/indicators recently such as coolant loss, slight over temp, mixing etc.
You need to smoke test the intake and exhaust to verify leakages. If you have a known exhaust leakage (exhaust noise) or can see black contrails of carbon around the exhaust header flange or header pipes where they are welded to the flange plate, that would be a good visual indicator.
I suppose the only other time you could have one bank throwing a lean code also would be a coolant leak into the combustion chamber. Typically that will result in some white, sweet smelling smoke at start up and while driving unless it is a VERY small leak that only sucks enough to throw off the AFR via the oxygen content of the coolant mixture. This i think is probably pretty unlikely unless you've had some other issues/indicators recently such as coolant loss, slight over temp, mixing etc.
#24
07-13-2010 | 11:30 AM
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Joined: Jun 2008
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From: Mill Creek, WA
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Again, if after 60-70 miles from when you have cleared codes last, you still only get one fault code (p1130), then you have only one bank affected and that would almost certainly be and air leakage before the intake ports or after the exhaust ports but before the front O2 sensor. That is called unmetered air (air not metered/accounted for by the MAF).
You need to smoke test the intake and exhaust to verify leakages. If you have a known exhaust leakage (exhaust noise) or can see black contrails of carbon around the exhaust header flange or header pipes where they are welded to the flange plate, that would be a good visual indicator.
I suppose the only other time you could have one bank throwing a lean code also would be a coolant leak into the combustion chamber. Typically that will result in some white, sweet smelling smoke at start up and while driving unless it is a VERY small leak that only sucks enough to throw off the AFR via the oxygen content of the coolant mixture. This i think is probably pretty unlikely unless you've had some other issues/indicators recently such as coolant loss, slight over temp, mixing etc.
You need to smoke test the intake and exhaust to verify leakages. If you have a known exhaust leakage (exhaust noise) or can see black contrails of carbon around the exhaust header flange or header pipes where they are welded to the flange plate, that would be a good visual indicator.
I suppose the only other time you could have one bank throwing a lean code also would be a coolant leak into the combustion chamber. Typically that will result in some white, sweet smelling smoke at start up and while driving unless it is a VERY small leak that only sucks enough to throw off the AFR via the oxygen content of the coolant mixture. This i think is probably pretty unlikely unless you've had some other issues/indicators recently such as coolant loss, slight over temp, mixing etc.
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