P0030 HO2S Heater Control Circuit B1S1 OBD-II Trouble Code Technical Description Article byDale ToalstonASE Certified TechnicianGeneric: HO2S Heater Control Circuit (Bank 1 Sensor 1) GM: HO2S Healer Control Circuit Conditions What does that mean? For an engine to run properly, there needs to be a very specific air:fuel ratio of 14.7:1. To accomplish this the ECM (Engine control module) relies on the the Heated Oxygen sensors (HO2S). The HO2S detect oxygen content in the exhaust. This information is then relayed to the ECM. The ECM uses this information to adjust the fuel delivered to the engine. A Heated Oxygen sensor contains a circuit dedicated to operating a heater that warms up the Oxygen sensor faster than the exhaust gasses could. This shortens the time the engine needs to achieve closed loop, which decreases emissions. On some vehicles the O2 sensor heater is fed a 12V fused supply voltage and a computer controlled ground. The 12V supply voltage is supplied to the heater anytime the key is in the on position.

The computer activates the heater under certain circumstances by completing the ground to the oxygen sensor heater. On other vehicles the O2 sensor heater may be supplied a computer controlled 12 volts feed and continuous ground. If the ECM detects a fault on the Bank 1, sensor 1 heater circuit a P0030 may set. Symptoms of a P0030 DTC may include: Lengthened time needed to achieve closed loop MIL (Malfunction indicator lamp) illuminationcarrier 13 seer air conditioner cost Possibly decreased fuel mileage depending on faultdx split air conditioning units Potential causes of a P0030 trouble code may include:haier window ac unit manual Failed or damaged heater circuit element inside the HO2S Open on the O2 sensor heater's ground circuit

Open or short on O2 sensor heater's B+ battery feed (on some vehicles this may be the control circuit) Possible ECM failure (less likely) Many times a HO2 sensors heater element may go bad due to age or impact. Keep this in mind when making your inspection. Make a visual inspection of the Bank 1,1 O2 sensor. Repair any damaged wiring from contact with exhaust. If HO2 Sensor itself appears to have been damaged, replace it. If a visual inspection reveals no obvious problems, viewing the faulty heater circuit on a scan tool may reveal if the fault is currently occurring. If the scan tool datastream shows that the Bank 1,1 heater element is pulling 0 amps then suspect an open in the circuit. Check for blown fuses and then disconnect the O2 sensor connector. With key on engine off use a voltmeter to check for 12 volts fused battery feed to the heater element. If there is no voltage present, repair open or short in the B+ feed circuit remembering to replace any fuse blown from the short.

If the B+ battery feed is intact, remove the ground (control) circuit from the ECM wiring connector and check for resistance on the circuit. If there is infinite resistance, repair open in the circuit. If the control circuit checks out, suspect a bad O2 sensor. Register now to ask a question (free) Related P0030 DTC DiscussionsTrouble with '06 pathfinder p0030O6 pathfinder...began to shake while idling at light n service engine light came on. Had oreily auto parts scan for codes. Showed coil for cylinder #1 to be faulty. Replaced with used coil. Problem seemed to b fixed. Drove 1 mile or so to autoparts store cause i broke battery terminal while putting ... GLS 2013 Elantra 1.8L Hyundai P0030 P0135 P2118 codesI have three codes that I already know one of them they are p0135 p2118 and p0030 P0135 I know what it is already but need help with the other two... 2006 Ford Focus Engine light P0030 P0037 P0050 P0057hi, I have got Ford focus 2006 1.6 petrol zetec 5dr, engine light came on

few days ago, i used code reader turn the light off two times but it comes back with these codes, P0030, P0037, P0050, P0057.My question is why it comes with these four codes at a time, is there a big fault?or should iMini Cooper R56 p0030 O2 sensorPlease help I have a p0030 code come up on my 2007 Mini Cooper R56. Where Is the location of the lambda sensors and does the "bank 1 sensor 1" mean that it is the sensor pre or post cat?2006 chevrolet trailblazer OBD code p0030where is the HO2S Heater Control Circuit Bank 1 Sensor 1 on a 06 trailblazer... Need more help with a p0030 code? If you still need help regarding the P0030 trouble code, please post your question in our FREE car repair forums. NOTE: This information is presented for information purposes only. It is not intended as repair advice and we are not responsible for any actions you take on any vehicle. All information on this site is copyright protected. If you want to share this article or information with others, please link to

this page, don't copy and paste it elsewhere.eBay Premium ServiceExcellent customer service as rated by buyers14-day returnsA free delivery optionA fast delivery optionLearn moreThe requested URL /model_faq.php?id=19 was not found on this server.Add an Aux Input to your BMW! Quidzel’s aux input kit allows you to plug in anything with a 3.5mm headphone jack into your BMW stereo. Simply plug the Aux In cable to the back of your stereo to enjoy listening to audio from your device. This aux input kit works with BMWs approximately 1997-2005 like the e46, e39, & e53 chassis without DSP or NAV. For pre 2003 BMWs, we offer a CD changer emulator module to enable a simple aux input. Quidzel prides itself in being an affordable option to get that aux in that you need for your BMW. Secure payment processing with Paypal No-Hassle Free Shipping in the USA Your satisfaction assured with no hassle returns within 30 days and a 1 year warrantee when purchased on our website. Pre 2003 BMW Aux Input kit

The simplest way to get an aux input for your older stereo. (Includes Emulator and Cable) Need a basic Male-Male aux cable? No, I’ve already got one $49.99 USDYes! Throw in a basic aux cable! Aux Input for 2003+ e46 models Only cable is necessary for ‘aux capable’ head units (~9/2002+) Quidzel’s products are compatible with most I/K-Bus equipped BMWs without Navigation, digital DSP Sound, or the optional OEM BMW Telephone/Bluetooth. (Please check with us first on 02+ e39/e53, as we want to ensure compatibility) Your satisfaction is guaranteed with a 1 year warrantee, and we offer no hassle returns within 30 days. Plan on 1/2 hour install on an e46. Aux Input Cable is 1m long, allowing for installation on lower dash or glovebox area. Drill 1/4″ hole and install, leaving a clean finish, or leave exposed with no drilling required. Here’s mine installed in the sunglasses cubby under the climate controls. Terminated in a 3.5mm female panel mount jack and connects to the back of your stereo.

Install connector silver side UP to back of head unit marked RED. For 2003+ e46 aux cable, install connector silver side DOWN to back of head unit marked ORANGE. Small module interfaces with the Radio to select CD changer input. Our aux input replaces your CD changer, if so equipped. Make sure that your CD changer wiring color and order match exactly to the following image, with the module’s silver stripe lined up with the brown wire. (Note: please view the install video to understand the installation. If this appears complex, seek the help of a professional car audio installer near you, who should be able to install this easily.) Quidzel backs up our audio integration products with great customer service and please contact us for any concerns. Module installation: We’ve designed the module to be very simple – as long as you find the right connector and plug it in the correct way, everything should *just* work. If it doesn’t, we want to help you out. If you are having issues with your aux input installation, here are some suggestions to try:

CD Changer Emulator Module Installation: If you are unable to switch to the AUX from the stereo head unit, this indicates that the module is not communicating correctly with the stereo. Did you correctly locate the CD changer wiring, with a six pin and 3 pin connector? Often times, people are confused by a similar 3 pin connector which is for the phone system. Accidentally plugging the module into the phone connector will damage the module. The voltage polarities are reversed for this connector, and the wiring has a different coloring order. Contact us for a no hassle module replacement if you happen to have plugged the module into the phone connector. Did you find the correct CD changer connections, but reversed the module installation? This locks up the iBus, and requires only that you reset the stereo by pulling the stereo fuse for 30 seconds after restoring the proper module orientation. If you’ve lost connectivity with your aux input after a successful installation, our first recommendation is to reset the module by removing and replacing the module with the stereo on.

This will send a message to the stereo letting it know that the module has been reset. If you have to reset the module often, please contact us for a replacement. Every module is tested before it is sent to you, but occasionally you will end up with a faulty module, and contact us for a replacement. After you are able to select the AUX input on your head unit, install the AUX cable to the back of the head unit. You must remove the CD changer prewiring from the harness connector. This is attached with a blue clip, and place the AUX cable onto the same CD changer connection. On models that have 12 pin CD changer connectors, skip the first two pins to the left, pins 1 & 6.Drop us a line. Please Read the installation guide first! We are thankful for our customers who have graciously offered their reviews of Quidzel and the Aux Input: 12345  Check this box to confirm you are human.     Quidzel   It Works on my 2000 323ci, install took 15 min and was super easy, Very happy to find a solution to add an aux to my stock bmw deck for a decent price.

Arrived faster than i thought. It is literally a plug and play device! Had it working in only 15min! Worked for my 2001 325i BMW. Thank you for this product! I struggled to find a way to add aux on my car and this made ur possible. This thing is awesome. I ordered it on a Saturday, it arrived Wednesday. Install and setup was as easy as advertised. I have a 2000 323. Business model head unit w/ no aux button. Now I can use my iPhone with my original head unit. I really like the fact I can use my steering wheel controls for volume. Fast delivery ,easy instructions and a product that works as advertised. This little device is amazing! Plugged it in just as shown on the diagrams and voila! Very happy with the new ability to play my own music. Thank you so much for making the BETTER alternative to buying a new head-unit just for aux! The aux setup was extremely easy to install thanks to the clear, simple instructions. Initially the module I received didn't mesh well with my car so I contacted their customer service and was greeted with a very fast and helpful reply.

Long story short, I had a very pleasurable experience dealing with these guys and will recommend them to anyone looking for this sort of product.Thanks for the very kind words! We strive to give our best for each customer. Very clear instructions made this a simple install. Finally a product that offers those of us with older head units the option for aux input and for a great price, THANK YOU!!! Inexpensive way to add AUX capability to your E46. Technical literatures and videos on how to make this a DIY are readily available making the install a breeze.Over all, AN AWESOME PRODUCT WHICH SPEAKS VOLUMES ABOUT THE COMPANY THAT PRODUCED IT!!!We will continue to do our best to serve you! This is the greatest thing ever. You have saved me from the static of the radio and the hiss of cassette tapes. It was a really simple install. Everything worked perfect the first time and I am still in shock that I can finally listen to my ipod in my 2000 328i without having to use a knock off head unit 🙂Thanks for the review Adam! W