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Code C1237

Tiny
HASANABUSINI
  • MEMBER
  • 2014 HYUNDAI SONATA HYBRID
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
Good evening,
I got a code on my vehicle listed above.
C1237 primary pressure sensor signal.
Can you help me to determine the problem?
Should I change the HECU?
Thanks
Tuesday, September 10th, 2019 AT 12:21 PM

10 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny,

I've attached step-by-step diagnostic instructions below to check first before replacing the HECU. Hope this helps and thanks for using 2CarPros.

Danny-
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Tuesday, September 10th, 2019 AT 12:40 PM
Tiny
HASANABUSINI
  • MEMBER
  • 4 POSTS
Check brake illuminated twice a day on the screen then I should stop the engine and start it again to solve the problem.
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Tuesday, September 10th, 2019 AT 1:01 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Did that solve the problem or does the symptom persist? Thanks again for using 2CarPros.

Danny-
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Wednesday, September 11th, 2019 AT 4:00 PM
Tiny
HASANABUSINI
  • MEMBER
  • 4 POSTS
The problem was solved and then reappear after about 15 miles.
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Thursday, September 12th, 2019 AT 1:07 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 44,463 POSTS
It sounds like the ABS pump is out or the sensor is bad.

C1237 Primary Pressure Sensor-Signal
General Information

Component Location

General Description

There are three pressure sensors in HPU (Hydraulic Power Unit). They each measure high pressure accumulator pressure, booster pressure, pedal simulator pressure. AHB ECU (Electronic Control Unit) uses these measured values to monitor AHB operatoring status and control AHB.
After replacing AHB ECU, pressure sensor calibration and PTS calibration are essential.

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Monday, September 16th, 2019 AT 11:07 AM
Tiny
HASANABUSINI
  • MEMBER
  • 4 POSTS
AHB ECU replaced, the problem resolved.
Thanks
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Thursday, September 19th, 2019 AT 1:49 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Glad to hear !
Thanks again for using 2CarPros and please feel free to use us again if needed.
Danny-
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Thursday, September 19th, 2019 AT 6:59 PM
Tiny
OSAMA AHMAD
  • MEMBER
  • 3 POSTS
The error appeared when computer check was code C1237?
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Saturday, September 5th, 2020 AT 1:08 PM
Tiny
OSAMA AHMAD
  • MEMBER
  • 3 POSTS
Did it means I should replaced the ABS?
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Saturday, September 5th, 2020 AT 1:09 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

You've attached your question to one that is a year old.What we ask you to do is start a new question and be sure to include all your vehicle information.Here is the link:

https://www.2carpros.com/questions/new

We will be looking for your question.Hope this helps and thanks for using 2CarPros.
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Saturday, September 5th, 2020 AT 3:26 PM

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