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Hi
i am getting a check engine light, my scanner reset it but came back. Can someone here help diagnose this? Thanks Larry
Car Scanner ELM OBD2
DTC report
Selected brand: Mercedes-Benz
============1==============
P1236
Raw code: 1236
ECU: 01
Status: Pending
OBDII: Fuel Pump Control Out Of Range
Mercedes-Benz: Fuel pump control out range
============2==============
P3600
Raw code: 3600
ECU: 01
Status: Pending
============3==============
B2C12
Raw code: AC12
ECU: 01
Status: Pending
============4==============
P1235
Raw code: 1235
ECU: 01
Status: Pending
OBDII: Fuel Pump Control Out Of Range
Mercedes-Benz: Fuel pump control out range
============5==============
P1525
Raw code: 1525
ECU: 01
Status: Pending
OBDII: Air Bypass Valve System
Mercedes-Benz: Right adjustable camshaft timing solenoid (Y49/2)
============6==============
P1420
Raw code: 1420
ECU: 01
Status: Pending
OBDII: Catalyst Temperature Sensor Failure
Mercedes-Benz: AIR pump switchover valve (Y32)
============7==============
P0143
Raw code: 0143
ECU: 01
Status: Pending
OBDII: Heated oxygen sensor (HO2S) 3, bank 1 - low voltage
============8==============
C086B
Raw code: 486B
ECU: 01
Status: Pending
============9==============
P1235
Raw code: 1235
ECU: 01
Status: Confirmed
OBDII: Fuel Pump Control Out Of Range
Mercedes-Benz: Fuel pump control out range
============10==============
P1525
Raw code: 1525
ECU: 01
Status: Confirmed
OBDII: Air Bypass Valve System
Mercedes-Benz: Right adjustable camshaft timing solenoid (Y49/2)
============11==============
P1420
Raw code: 1420
ECU: 01
Status: Confirmed
OBDII: Catalyst Temperature Sensor Failure
Mercedes-Benz: AIR pump switchover valve (Y32)
nobody answered you yet? this is quite a list of codes...fuel pressure being out of range by itself might only be obvious under big load and if the motor bucks or stalls it could trigger many other codes. are there any obvious performance misbehaviours? did you just get this car or was it fine for a long time and suddenly this?
Thanks
the car runs great, no issues on
power or bucking …. I have owned this for years….. has 53k miles….. gets about 18-22 mpg. I did clear the code and it came back almost immediately
I looked at your list again and wonder if your car has this electric motor blowing air in to exhaust at cold start. From what I have learned, the O2 sensors are trained to determine inferentially during warmup if this system is doing its job or not. One of your codes sounds like it might be pointing that way. But if the catalyst temp is not being properly detected, then there will be domino effect from that I suggest including possibly a fault with air bypass. Or is air bypass code for idle air control? Any car with a closed loop system will stop making sound decisions if it loses vital data from the O2 sensors. Since those are intimately connected to the cats, the car will realize it cannot execute proper self control since it lacks the data to make adjustments to timing and mixture and cam timing. The wild card here is fuel pump control. If the power is smooth no matter the load, the fuel pump is working. I am just thinking out loud here; I am not any kind of guru. I have owned dozens of cars including jaguars which I had to learn how to fix myself lest I part with lots of money. I am guessing you would rather not just drive to dealer and pay them whatever they want to have their way with you. Can you get a OBD real time dongle and an app like torque or torque pro on your phone or tablet? It can show you live data while you are driving and give more insight. The dongle is less than $50 and pay version of torque is less than half that I think.
I’m pretty sure this has been closed I just want to make sure that I’m posting to the correct area, I have recently swapped out the gear selector because of a limp mode issue, the car ran great and passed vehicle inspection after the swap my blinkers stopped working as well as the hazard lights. And then I noticed the the car would shift through the gears fine until I came to a complete stop and the she slips right back into a limp mode but I get stuck in drive or 3rd gear,so I ran a scan and have come up with this code and can’t track it down.
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