1 like 0 dislike
320 views
by (105 points)

Need your help.
I wonder if anyone experienced similar or could provide possible root causes for me ( a DIY , 3-4 degree ) to fix.
Are these code related? where should I look into?
C1241: "ABS Hydraulic Pressure Differential Switch Input Short Circuit To Ground"
C1407: "Traction Control Valve Rear Circuit Short To Battery"
C1408: ?
my Corolla has154040 miles, in the past 4 or 5 years, once a while , the VSC OFF light will come on when passing a puddle (but not every time especially if it's not in acceleration.)
it will go off after few days or couple of weeks.
This time it happened with P0138,? Not sure if they are related (hot line short?)
Please help, all clues are welcome.
Thank you.

Ref. per "C1241 Code, 2010, Highlander" link,
so, I got two questions:
1. per carponets, C1241 is "ABS Hydraulic Pressure Differential Switch Input Short Circuit To Ground"
2. I checked my battery is old "12/16", however voltage is ok 12.30V.

Vehicle: 2010 Toyota Corolla LE 1.8L

1 Answer

1 like 0 dislike
by (8.3k points)
 
Best answer
The description you got of the codes is not correct, the correct description for your model and year are below. The only thing that could set all codes is the battery, but it's not common for a bad battery to set those codes.

I recommend starting by checking the battery voltage, then checking the rear ABS sensors (also known as Wheel Speed Sensor) for the C codes.

For the P0138, more than likely is not related to the other codes, you must replace the Oxygen sensor to fix that code.

C1241 TOYOTA Code - Low Battery Positive Voltage
Read more: https://www.autocodes.com/c1241_toyota.html

C1407 TOYOTA Code - Open Or Short In Rear Speed Sensor Right Circuit
Read more: https://www.autocodes.com/c1407_toyota.html

C1408 TOYOTA Code - Open Or Short In Rear Speed Sensor Left Circuit
Read more: https://www.autocodes.com/c1408_toyota.html

P0138 TOYOTA Code - Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2
Read more: https://www.autocodes.com/p0138_toyota.html
by (105 points)
0 0
Thank you very much. (I will continue updating for others reference.)
There are other codes coming up after my 1st question asked. (details in latter part of this message.)
What I did:
1. I changed both upstream (AF ratio) n downstream (O2) sensors.
2. Change a new battery.
After restarted, yes, P0138 is off for now. will drive road test 50 miles plus to see if it's completely  resolved.

I opened all 4 ABS speed sensors (before installing new battery .
Tried to measure resistances of them and checked if I can see voltage outputs, but got confused.
**  (question: can a speed sensor be verified still good or bad by measuring sensor itself on wheel? )
Below are my readings:  
(more explanations followed at %%)
Left Front:             (Meter setting)         Right Front:
O.L    --   O.L             (Continuity)              200 Ohm -- O.L
O.L.   -- 1947**Ohm   (2K)                        O.L    ---  1954 ** Ohm
O.L    --   761 Ohm   (20K)                          O.L   ---  785 Ohm

Rear  Left:                  (Meter setting)       Rear Right:
 -- -- lost reading--        (continuity)            --- lost reading --- - --- -  
O.L   --   1943** Ohm  (2K)                         561 Ohm  -- 1945** Ohm
7510 Ohm  --    O.L      (20K)                       2650 Ohm  -- 14370  Ohm.

** stands for highest reading which only appeared shortly, less than 1 second then turn to O.L.
%%
I switched electric test probes (+/-) to get different readings out of curiosity. at each setting.
Q1: Anyone may know why polarity make reading different?
Q2: Can above readings mean they are all bad?

I was not able to get any voltage out put after turning the front rotors.

Plan to order all 4 sensors to replace. But before that,
Please advise will a bad ABS control module causing sensors go bad, or vise versus?
How to determine if my ABS control module is bad ?

I also Got a new code:  U0100 ;?
A code says Electric Motor Power Steering code problem.
These seems not showing after reset/clear codes. ?
Again, thank you for your help.

Related questions

1 like 0 dislike
1 answer 347 views
0 like 0 dislike
1 answer 679 views
asked Oct 20, 2017 by Charly
0 like 0 dislike
1 answer 1.8k views
asked Jul 22, 2017 by big-douglas

36.2k questions

32.2k answers

1.3k comments

22.8k users

Need A Repair Shop?
Find local automotive repair shops in your area.
Does your car have Safety Recalls? → Check here
...