Porsche 996 P1124 and P1126

Discussions that report a fix

1

Discussions that report an unsuccessful attempt

1

Discussions that performed work without a confirmed outcome

7

Discussions that contain suggestions

10

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

11 discussions have direct query context; 1 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported fix

Since it appeared the MAF was the issue I pulled the MAF out and cleaned it using CRC MAF cleaner and the codes have not returned after about 800 miles.

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CEL code help - P1126, P1133, P0102

Unsuccessful attempt · Original poster

I cleaned the MAF with electrical cleaner real well, but it took about 60 miles before the CEL came back.

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unusual noise and symptoms, what the hell is it?

Performed · outcome unconfirmed · Original poster

I replaced plugs and seals, the fuel filter, air filter, cleaned the MAF, Checked for AOS leak via the Oil Cap Test, and added a bottle of Techron about 3 months ago.

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P1124 & P1126 CEL codes

Discussions that performed work without a confirmed outcome

6

Discussions that contain suggestions

9

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

7 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

- I replaced the MAF with a new Bosche MAF.

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Car doesn't want to idle

Performed · outcome unconfirmed · Original poster

I think it has got to be a vacuum leak as I changed the MAF for a new Bosche same part number about 2 months back.

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does anyone know? OHMS reading

Suggestion · Original poster

Replace MAF?

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CEL - P1126

Discussions that performed work without a confirmed outcome

3

Discussions that contain suggestions

5

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

1 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I disconnected the battery for an hour, which I presume clears the DME - there were and are no DME fault codes.

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Which O2 sensor

Suggestion · Original poster

I am also going to disconnect my battery for 20 minutes or so to reset the CEL.

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unusual noise and symptoms, what the hell is it?

Performed · outcome unconfirmed · Original poster

I disconnected the battery for 15 minutes to reset the CEL.

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unusual noise and symptoms, what the hell is it?

Discussions that performed work without a confirmed outcome

1

Discussions that contain suggestions

4

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

2 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

No idea what to do next other than check for intake leaks again.

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1999 996 CEL P1124/26 P0130/50 P1410/11

Suggestion · Original poster

I bought a set of the security torx bits, and I made up a contraption with a propane tank and extended nozzel to check for intake leaks...

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CEL came on this morning... and got the following codes (UPDATE)

Suggestion · Original poster

I've had my mechanic check for vacuum leaks, clean the contacts, and install a new factory MAS, but the codes keep coming after 3 drive cycles or so.

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CEL and erratic idle, revisited

Discussions that performed work without a confirmed outcome

1

Discussions that contain suggestions

4

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

2 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

Replaced the AOS yesterday.

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2 part question

Suggestion · Original poster

Question 1: Should i think about replacing the AOS to be safe?

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2 part question

Suggestion · Original poster

it was still clean and shiny, so it is pretty clear that I somehow managed to pull this loose while I was replacing the AOS.

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code P0343 - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Discussions that contain suggestions

4

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

2 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

The car has/had the codes P0134 & P1126, (with no CEL) - should I reset them now after changing the O2 sensor?

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Which O2 sensor

Suggestion · Original poster

Replace all Oxygen Sensors

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Trouble Codes: Need help/suggestions/advice

Suggestion

Have you replaced the O2 sensors?

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Car is running very rich.

Discussions that performed work without a confirmed outcome

2

Discussions that contain suggestions

2

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

1 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I run the car on weekends only.

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P1124 & P1126 CEL codes

Performed · outcome unconfirmed · Original poster

When I ran the car with the old sensor connected (but not in the exhaust), the scanner reading still said zero.

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Which O2 sensor

Suggestion · Original poster

Clear out of the blue, my car is now throwing 3 simultaneous CELs accompanied by rough running initially after startup, though it does clear once you've run the car.

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P0507, P1126 & P1128 Cel Codes w/video

Discussions that contain suggestions

3

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I will check the fuel pressure.

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OBDII Fault Code Question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Suggestion

Check your fuel pressure with a real pressure gauge under FULL LOAD ONLY...report back..

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2003 996, loss of power under load

Suggestion

Did you check the fuel pressure again?

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1999 C4 Cabrio Won't Start

Discussions that performed work without a confirmed outcome

1

Discussions that contain suggestions

2

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

3 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I quickly checked the oil cap for signs of AOS failing and it seems the same as always, easy to take off, but engine will stumble slightly after a few seconds of having it off.

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Vacuum oddities - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Suggestion

Check oil cap.

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I am getting sick of replacing the MAF

Suggestion

Check oil cap.

Original post Read captured discussion

MAF replacement

Discussions that contain suggestions

3

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I thought I'd check the wiring from the sensor to DME.

Original post Read captured discussion

Which O2 sensor

Suggestion

But with those codes I would first check your wiring to the pre-cat O2 sensors.

Original post Read captured discussion

Car doesn't want to idle

Suggestion

You could visually check the wiring for the sensors to see if the are broken or chewed.

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Help with Emission Codes

Discussions that report identifying a cause

1

Discussions that suspect a cause

3

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

2 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported cause

I had the same 2 codes, it was the AOS.

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does anyone know? OHMS reading

Suspected cause · Original poster

Ai indicates that the main cause is probably the AOS.

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Engine shut down - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Suspected cause

Of the above, fuel supply/pressure problems are generally rare, while almost every owner (it seems) has had an AOS go bad, so I'd suspect the AOS first.

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cel light on

Discussions that suspect a cause

4

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

4 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause · Original poster

I thought it was the MAF so I bought a new one.

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MAF Dilemma

Suspected cause

Codes P1124 P1126 are usually accompanied by negative -0.36 and is caused by a MAF Sensor that is dirty and sending a higher kg/h value than is expected..( should be about 15kg/h at warm idle A/C off)

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Porsche Regeneration Valve from Throttle Body for Fuel Vapor System

Suspected cause

The common fault cause is the MAF, so I would try a new one.

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Urgent in France - 996TT Yellow Gunk Oil Cap

Discussions that report identifying a cause

1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported cause · Original poster

Well that was what the problem was 2 1/2 years ago.

Original post Read captured discussion

I am getting sick of replacing the MAF

Discussions that report identifying a cause

1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported cause

I appeared to me the problem was the cap's fingers that worked to pull the cap down and snug on the oil filler tube were just worn.

Original post Read captured discussion

I am getting sick of replacing the MAF

Discussions that report identifying a cause

1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

1 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported cause · Original poster

Issue was the CPS connector.

Original post Read captured discussion

2004 C4S aos replacement

Discussions that report a fix

1

Discussions that report an unsuccessful attempt

1

Discussions that performed work without a confirmed outcome

7

Discussions that contain suggestions

10

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

11 discussions have direct query context; 1 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported fix

Since it appeared the MAF was the issue I pulled the MAF out and cleaned it using CRC MAF cleaner and the codes have not returned after about 800 miles.

Original post Read captured discussion

CEL code help - P1126, P1133, P0102

Unsuccessful attempt · Original poster

I cleaned the MAF with electrical cleaner real well, but it took about 60 miles before the CEL came back.

Original post Read captured discussion

unusual noise and symptoms, what the hell is it?

Performed · outcome unconfirmed · Original poster

I replaced plugs and seals, the fuel filter, air filter, cleaned the MAF, Checked for AOS leak via the Oil Cap Test, and added a bottle of Techron about 3 months ago.

Original post Read captured discussion

P1124 & P1126 CEL codes

Discussions that report a fix

1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported fix

The final thing I did was replace the AOS Bellows and that solved the problem.

Original post Read captured discussion

P1124 P1126 at idle