Pedant

Just bought this car. Many codes popped up after 200+ miles. The mechanic who checked it obviously didn't have a good enough scanner to find the codes hidden in memory.
Or is it possible to wipe all evidence away?
The worst seems to be ECM codes which I discovered with my BLue driver.

P0607 SCION Courtesy of a code website...
Faulty Engine Control Module (ECM) Engine Control Module (ECM)
Harness power supply circuit is open or
shorted Engine Control Module (ECM) Programming

U0100 SCION - Lost Communication With Engine Control Module/Powertrain Control Module
U0100 SCION Possible Causes
Faulty Engine Control Module (ECM) / Powertrain Control Module (PCM)

QUESTION.
Do I need to replace ECM? I see companies offering programmed ECM. Is this a good idea? Anyone have recommendations?
I cannot find the ECM. I took off glove compartment and nothing there. Where is it?
I saw someone posted a link to online manuals but those no longer work. Anyone have a copy please?
Here are the other codes.
Any ideas where to start would be appreciated. Garage is out of question. Only on Social Security.

Code plus commentary via one of the code websites
P0138
P0138 SCION Possible Causes

Faulty Rear Heated Oxygen Sensor Bank 1
Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
Intake air leaks
Exhaust gas leaks
Inappropriate fuel pressure
Faulty fuel injectors

Replacing the Rear Heated Oxygen Sensor Bank 1 usually takes care of the problem.
C0210 SCION - Right Rear Wheel Speed Sensor Signal Malfunction

C0210 SCION Possible Causes
Faulty Right Rear Speed Sensor Right Rear Speed Sensor harness is open or
shorted Right Rear Speed Sensor circuit poor electrical connection
Right Rear Speed Sensor rotor Sensor installation Brake actuator (skid control ECU)

C0215 SCION - Left Rear Wheel Speed Sensor Signal Malfunction
C0215 SCION Possible
Faulty Left Rear Speed Sensor
Left Rear Speed Sensor harness is open or shorted
Left Rear Speed Sensor circuit poor electrical connection
Left Rear Speed Sensor rotor
Sensor installation Brake actuator (skid control ECU)

C1201 SCION - Engine Control System Malfunction
C1201 SCION Possible Causes
Sequential Multiport Fuel Injection (SFI) System Problems Check for other codes
If the C1201 is combined with an Oxygen (O2) Sensor code, repair the O2 sensor code first and clear the codes.

C1241TOYOTA - Low Battery Positive Voltage
C1241 TOYOTA Possible Causes
Low Battery Charge Faulty Battery Faulty Charging System Power source circuit

C1239 SCION - Foreign Object Attached On Tip Of Left Rear Sensor
C1239 SCION Possible Causes
Faulty Left Rear Speed Sensor Left Rear Speed Sensor rotor Sensor installation Brake actuator (skid control ECU)

I am feeling a little overwhelmed.

Can anyone help please?

____

Greg S

iTrader: (1)

Since it's a 2008 put the VIN up on Toyota's recall site and see if your car falling into the build dates for the possible faulty engine wiring harness recall. You're well outside of the warranty period but it looks like that might be your actual problem and not the ECU.

Here's the TSB and VIN dates.

TSB # S-SB-0050-08 November 12, 2008

This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown below.

Just noticed that I missed the low battery voltage code. Aside from checking the VIN date also check all your main ground fro the battery to chassis and engine to chassis. The main ground point directly under the air box can get loose or corroded and this will cause a multitude of issue as your perceived battery voltage will fluctuate all over the place.

AUTOMATIC TRANS VIN# JTLKE50E*91067111
MANUAL TRANS VIN# JTLKE50E*91067112

Pedant

Great tips. Will report back. Thanks.

Pedant

Just Takata air bags and brake kit in recall. I'm surprised there is a fix for Takata.

Greg S

iTrader: (1)

The fix for the Takata recall is a new airbag.

I would check what the voltage across your battery terminals is and them check the voltage again using the engine as the ground instead of the battery. It should be very close, if there is more than 0.5 volt difference you have a grounding issue.

Pedant

Not good with Voltmeter so I changed ground strap. It looked patinated. Thanks for help. I still can't find the ECM. It is not behind the glove box.

MR_LUV

What Drive line is your xB?

If you tell me the Model Year & Drive line (Manual or Auto), I can do some Research and Might be able to come up with the Part No., Price, Source, Diagram, Location.

Sticky Where to Post Your Question

I have been here Every Day for over 12 years and it Always surprises me people want Part Numbers, Parts Information or Location
but don't give out their Model Year & Drive line (Manual or Auto).
When you go to a Toyota Parts Department, or any Cars Parts or Auto Store they always want the Make / Model Year / Drive line.

Why?

Do Not Assume that Part Numbers stay the same within that Generation of Cars. Part Numbers can be Changed, Superseded,
or No Longer Available. Those Interior Parts / Engine Parts you want may be available in 2004 and Changed to a Different Number in 2006 or 2016.
Some Part Numbers are Different on Manuals vs Automatics.
Or even Worse No Longer Available for any Model Year. I can at least Cross-Reference it if you give me the Model Year & Drive line.

TL;DR If you want a Specific Part No. or Specific Answer, you need to Provide Vehicle Specifics for us to look it up.

MR LUV

p.s. I Strongly Advised Members to Add their Model Year in their Signature
See examples in the Sticky Above. Or Please State it in Each Question.

__________________

Pedant

Thanks so much. I know of a few companies that sell programmed ECM's on eBay. Plus one can buy used if one had the parts number off the one located in car. I am not sure what one does after that. I read these ECM';s are plug and play so theoretically I plug in and
after a while it learns everything. Except with this latter route one still needs to program the VIN. I am leaning toward simply buying a programmed ECM. My biggest issue is I cannot see the ECM where it is supposed to be. All the videos and diagrams has it behind the glove box.
Mine is a 2008 xB 2.4L auto trans. I may have to ask the Toyota dealer when I take it in for airbag recall. If you have a great repair manual maybe you can see where it is.

I've been getting my car details from:

https://www.carpdfmanual.com/scion/

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Pedant

Just looked at your photos of your car. All I can say is WOW. You're a true disciple. How did you paint the gold on the exhaust cover thingy?

MR_LUV

Sorry, I Do Not have any Service Manuals or Online Manuals. I have No Idea if the ECM is your Problem or Not.
But, checking with any Toyota Online Parts Lists shows the ECM Location in the Engine Compartment.
Also found a used one on eBay:

2007-2008 Scion xB Engine Control Unit ECU 8966112J60 Module 403-4B5

Or you can try a Auto Junkyard or a Pick N' Pull.

Hope this Helps,

MR LUV

__________________

MR_LUV

VHT SP402 Engine Metallic 11 oz. Burnt Copper Aerosol High Temperature Paint


MR LUV

__________________

Greg S

iTrader: (1)

The ECM is the big silver box with 100+ wires going into it between the engine fuse box and the battery.

Pedant

Thanks. Spot on. So much for Scotty Kilmer saying Toyota are smart because they put their computers inside the car and away from heat and issues in engine bay.