05-06-2016, 05:09 PM | #1 |
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Fault Code-Help!!!
I am having problems with fault codes that I believe have to do with the 02 sensor. Car has no power and drivetrain malfunctions regularly.
Codes are: 1B5202 terminal-electrical short circuit to ground or open ci 12B302-Lamba probe heating after catalyst activation short circuit to ground 12B102- same thing but before catalyst Any experience with this? I have installed the following: -Wagner downpipe and FMIC -BMS JB4 and intake -ER charge pipe Thanks!!!
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05-09-2016, 03:26 PM | #2 |
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Correct - your downpipe probably has no catalytic converter. JB4 should take care of faking the 02 sensor readings, but I'm not sure how to activate that. Could be one of the connectors to the 02 sensors is shorted out as well, or one of the sensors itself is damaged somehow.
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05-10-2016, 12:14 AM | #3 | |
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Still trying to figure it out.
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05-23-2016, 11:00 PM | #4 |
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Any other feedback. These codes are still coming up and not having much luck.
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05-23-2016, 11:44 PM | #5 |
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Sounds like it's related to the downpipe.
And some people say you can buy high-end downpipe and not get engine fault codes. |
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05-24-2016, 08:45 AM | #6 |
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That's an actual sensor issue, not a efficiency code which you will get from carless downpipes. The first one is to ambiguous but the second ones mean either bad connections or damaged sensors. Every O2 sensor has a heating element built in which is needed to give you accurate reading when you first start the vehicle. That is part having an issue.
Did you disconnect the sensors from the harness during install? |
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05-24-2016, 09:41 AM | #7 | |
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05-25-2016, 03:06 PM | #8 | |
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These errors are not related to the downpipe, it's either the sensor and it's wiring or improper installation which could damage the sensor. There's nothing wrong with the downpipe.
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05-25-2016, 03:09 PM | #9 | ||
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05-25-2016, 08:19 PM | #10 | |||
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I posted this after replacing the sensor actually.
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05-25-2016, 11:46 PM | #11 | ||||
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05-26-2016, 01:20 AM | #12 | |||||
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I appreciate any diagnosis and remedial work recomendations sir!!! ?
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05-26-2016, 01:22 AM | #13 | |||||
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05-26-2016, 03:29 PM | #14 | |
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The 2 O2 sensor faults are most likely related to the first fault based on the info I found. Hopefully it's just a fuse, that'd be the easiest solution, but I'm giving you all the info for a full diagnosis. Code:
Code 1B5202 Fault Description Diagnosis monitors the voltage supply line of terminals 15 N_1 and KL87_1 for open circuit and short to ground. Malfunction monitoring conditions The fault is detected when no voltage is applied at the DME input (KL87_1 or 15 N_1) despite the main relay being enabled. Action in Service - Check voltage supply and integrated supply module. - Wiring harness between DME and main relay - Replace Digital Motor Electronics main relay or power distribution box or integrated supply module. -Check lines and plug connections between the following components: - Engine control unit and Digital Motor Electronics main relay Code 12B302 Fault Description Diagnosis monitors the messages of the internal output stage diagnosis. The fault is detected by self-diagnosis. Possible cause of fault: - Wiring harness of oxygen sensor after catalytic converter defective - Oxygen sensor after catalytic converter defective - DME defective Action in Service --Consequential fault if additional faults from the relay for sensor/actuator supply or from terminal 15N_1 are present. Correct these faults first. Check lines and plug connections between the following components: - Integrated supply module. - DME. Check fuse, replace if necessary. - Eliminate secondary faults, faults for the following components/functions: -Check terminal 15 N_1 lines and plug connections between following components: DME Oxygen Sensor before catalytic converter - Check wiring harness of oxygen sensor after catalytic converter - Replace oxygen sensor after catalytic converter ( Do not allow plug connection to come into contact with cleaning agents or solvents, oxygen sensor can be destroyed) (The internal resistance of the oxygen sensor heater can be measured when disconnected/removed. A resistance greater than 1000 ohms can be measured between pin 1 (+12 V) and pin 2 (GND) in the event of a fault and when the sensor is cold (less than 50 °C). ) - Replace DME Code 12B102 Fault Description The diagnosis monitors activation of heating at the oxygen sensor before catalytic converter. Malfunction monitoring conditions The fault is detected when there is a short circuit to ground. Action in Service Consequential fault, rectify faults relating to the following components or functions: -- Terminal 15N_1 Consequential fault if additional faults from the relay for sensor/actuator supply are present. Correct these faults first. Check lines and plug connections between the following components: -- Integrated supply module. -- DME. Check fuse, replace if necessary. - Eliminate secondary faults, faults for the following components/functions: Check terminal 15 N_1 lines and plug connections between following components: DME Oxygen sensor before catalytic converter - Check oxygen sensor before catalytic converter (The internal resistance of the oxygen sensor heater can be measured when disconnected/removed. A resistance greater than 1000 ohm can be measured between pin 4 (+12 V) and pin 3 (ground) in the event of a fault and when the sensor is cold (less than 50°C). Do not allow plug connection to come into contact with cleaning agents or solvents, oxygen sensor can be destroyed) - Renew oxygen sensor before catalytic converter Also what does your JB4 read as AFR at idle?
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05-27-2016, 01:54 AM | #15 | ||
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AFR's are 16.9 at idle.
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05-27-2016, 05:20 PM | #16 | |||
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05-27-2016, 10:27 PM | #17 | ||||
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I have run several logs and it is undetectable under load. It idles like crap right now.
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05-29-2016, 12:52 AM | #18 | |||
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05-29-2016, 03:02 AM | #19 | ||||
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05-29-2016, 03:22 PM | #20 |
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Thanks man!! I really appreciate.
I pulled every fuse and inspected already.
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05-29-2016, 03:40 PM | #21 | |
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Sounds like he blew a fuse or damage the o2 sensor wiring doing the downpipe install. Mike |
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05-29-2016, 04:17 PM | #22 | |
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