P0446, P1128, And P1130 Error Codes
Thread Starter
Instructor
Joined: Jul 2007
Posts: 149
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P0446, P1128, And P1130 Error Codes
Hi, a couple weeks ago I reported that I had trouble starting my 1999 996 C4 (102,000 miles). The car would crank but would not turn over. It would only start if I pressed the gas pedal down. This does not have everytime I start the car. I would say 1/10 times. I was advise that I could have a block fuel injectors so I had the fuel system cleaning done. The car was fine for a couple of days and then it returned.... I did not get an codes during this time....
Just now, I got the following three codes:
P0446
P1128
P1130
I have read the post regarding these and was wondering if their is a connection? Is it time to take the car to the dealer and let them figure it out? Could a block fuel line cause these codes?
Thanks for the help....
Oh and I have already cleaned the thottle body and MAF......
Just now, I got the following three codes:
P0446
P1128
P1130
I have read the post regarding these and was wondering if their is a connection? Is it time to take the car to the dealer and let them figure it out? Could a block fuel line cause these codes?
Thanks for the help....
Oh and I have already cleaned the thottle body and MAF......
Last edited by ultramens; May 25, 2010 at 06:36 PM. Reason: update
Instructor
Joined: Jun 2010
Posts: 234
Likes: 0
From: San Antonio, TX
p1128 and p1130 have to do with the MAF... I got the same codes right after I installed a K&N Cold Air Intake. I used MAF cleaner on the sensor and it poped back 2 days later so i used Throtlebody/carb cleaner and made sure not to get any on the harness conection side and it took care of thoes two issues.
P0446 i have no idea about.
P0446 i have no idea about.
Odd Posts
Rennlist Member
Rennlist Member
Joined: Dec 2007
Posts: 3,633
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From: Ottawa, Ontario
P0446 is Carbon Canister Shutoff Valve Operation.
As indicated by Todd on Renntech (strongly suggest registering there for this type of question). P0446 indicates that there is a problem with the activated charcoal filter / tank vent system. This is causing the mixture problems leading to the P1128 and P1130 codes. Possible causes for the 0446 code include:
- Purge air line plugged
- Tank vent stuck in the open state (vacuum continuously enters the tank system from the intake pipe)
- Activated charcoal filter shutoff valve is plugged/stuck in closed state
- Flow resistance of the activated charcoal filter is too high (filter deformed/plugged)
- Pressure sensor closes incorrectly (polarity reversal)
The factory manuals have a diagnosis procedure to determine and remedy the cause.
-Todd
As indicated by Todd on Renntech (strongly suggest registering there for this type of question). P0446 indicates that there is a problem with the activated charcoal filter / tank vent system. This is causing the mixture problems leading to the P1128 and P1130 codes. Possible causes for the 0446 code include:
- Purge air line plugged
- Tank vent stuck in the open state (vacuum continuously enters the tank system from the intake pipe)
- Activated charcoal filter shutoff valve is plugged/stuck in closed state
- Flow resistance of the activated charcoal filter is too high (filter deformed/plugged)
- Pressure sensor closes incorrectly (polarity reversal)
The factory manuals have a diagnosis procedure to determine and remedy the cause.
-Todd
Rennlist Member
Joined: Apr 2006
Posts: 793
Likes: 30
From: Albany NY
Just check the codes for you and 1128-1130 are indeed related to the oxygen sensor. I am not sure about the P0446 but I am sure other will chime in to help you out...
- P0446 is "EVAP Canister Shutoff Valve (Function) - Below Lower Limit"
- 1128 is "Oxygen Sensing Adaptation Area 2 (Cylinders 1 - 3) - Rich Threshold"
- 1130 is "Oxygen Sensing Adaptation Area 2 (Cylinders 4 - 6) - Rich Threshold
- P0446 is "EVAP Canister Shutoff Valve (Function) - Below Lower Limit"
- 1128 is "Oxygen Sensing Adaptation Area 2 (Cylinders 1 - 3) - Rich Threshold"
- 1130 is "Oxygen Sensing Adaptation Area 2 (Cylinders 4 - 6) - Rich Threshold
