CEL On with Code P0030 after Catless DP install

miovo · 07-20-2021, 09:18 PM

Lets see if someone can help me here. Installed a VRSF Catless downpipe yesterday to pair with my bootmod3 tune. Disabled Cat Checking and did a reflash before I did the install.

Got it installed and drove it around for a bit. Sounded great. Awhile later I went on another drive but this time I had a check engine light. Scanned the codes and got a P0030 HO2s heater control circuit

Checked the connections and made sure they weren’t flipped, everything checked out. Other than me breaking the sensor, is there something else that could be wrong?

AlmondJayRoM3 · 07-20-2021, 11:08 PM

Due to the work you did damaged wiring or damaged sensor are the most likely culprit. Recheck connections for bent pins and look for pinched wiring. Also check continuity of wiring an if your obd reader has the capability, check lambda readings live from the upstream bank 1 sensor.

puma1o1 · 04-07-2024, 09:50 PM

Any updates on how you fixed this issue? My 2014 BMW 335i xdrive throws the same code after I installed my vrsf catless downpipe.

07-20-2021, 09:18 PM	#1
miovo New Member 0 Rep 11 Posts Drives: BMW X5 sDrive35i Join Date: Nov 2019 Location: Atlanta, GA iTrader: (0) Garage List 2015 BMW X5 [9.00]	CEL On with Code P0030 after Catless DP install Lets see if someone can help me here. Installed a VRSF Catless downpipe yesterday to pair with my bootmod3 tune. Disabled Cat Checking and did a reflash before I did the install. Got it installed and drove it around for a bit. Sounded great. Awhile later I went on another drive but this time I had a check engine light. Scanned the codes and got a P0030 HO2s heater control circuit Checked the connections and made sure they weren’t flipped, everything checked out. Other than me breaking the sensor, is there something else that could be wrong?
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07-20-2021, 11:08 PM	#2
AlmondJayRoM3 Captain 503 Rep 656 Posts Drives: 2016 M3 Join Date: Oct 2017 Location: Pittsburgh, PA iTrader: (0)	Due to the work you did damaged wiring or damaged sensor are the most likely culprit. Recheck connections for bent pins and look for pinched wiring. Also check continuity of wiring an if your obd reader has the capability, check lambda readings live from the upstream bank 1 sensor.
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04-07-2024, 09:50 PM	#3
puma1o1 Registered 0 Rep 1 Posts Drives: BMW f30 335i XDrive Join Date: Apr 2024 Location: Washington iTrader: (0)	Any updates on how you fixed this issue? My 2014 BMW 335i xdrive throws the same code after I installed my vrsf catless downpipe.
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