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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCodes P1119 and P0430 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported repair
Repair those and it has been great
Reported resolution
1
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0
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1
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Reported fix · Original poster
I fixed those and it has been great for the past year.
Codes P1119 and P0430 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Repair those and it has been great' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, The most frequently discussed action is 'Repair those and it has been great' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Repair those and it has been great', supported by resolution reports in 1 discussions. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed
The heater circuit is tested with a digital multimeter with the sensor still installed.
Codes P1119 and P0430 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check same circuit
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Suggestion
If the unit is in range, turn the ignition to on, and check the same circuit for voltage, you should see 12V.
Codes P1119 and P0430 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test heating circuit
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Suggestion · Original poster
Could you please show me how to test the heating circuit?
Codes P1119 and P0430 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test wiring
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion · Original poster
Do I remove the sensor and test the wiring on the sensor?
Codes P1119 and P0430 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
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Generation: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi guys,
A little background on what has been happening before the current problem. I've had my Boxster for a year, and it's currently at 140,000 miles. When I first got it, it had codes P1128 and P1130, which were caused by a couples intake and brake booster leaks. I fixed those and it has been great for the past year.
However, I've been getting code P0430 once in a while. I reset it and kept going every time. I notice that that code P0430 only comes on when I'm driving slowly in traffic, or when I'm driving around in a parking lot or structure, every single time.
Last week, I got code P1119, which pointed to the O2 sensor. I didn't reset it, but it went away by itself after a couple days. Yesterday, I got the check engine light again when I was crawling in traffic. The codes are P1119 and P0430.
I've done some research, but haven't found much about these codes together. I was planning to swap the O2 sensor to the other side to see what will happen, but my garage is not available at the moment, so I can't do anything. However, I want to gather as mush information as possible before I tackle this. What do you guys think or suggest I do?
P1119 is for low heating current on the O2 sensor ahead of the three way cat on bank 4-6; P0430 is for a low conversion rate on the cat on the same bank.
I would test the heating circuit on that sensor and see if has gone bad.
The heater circuit is tested with a digital multimeter with the sensor still installed. You are looking for the presence of resistance between pins 1 & 2 on the connector, and should see between 1.8 and 2.5 ohm. If the unit is in range, turn the ignition to on, and check the same circuit for voltage, you should see 12V.
This is a source reference. Confirm exact model applicability in the original material.
