Error Code P2237: What It Means & What To Do?
OBD Code P2237 - O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1
The P2237 is a generic OBD-II error code which is
set by the Engine Control Module (ECM) of your vehicle. The ECM will set this
code when it detects an issue with the oxygen sensor for bank 1 sensor 1 and
there’s also an open circuit in heater control of the oxygen sensor. It reaches
this conclusion after testing the sensor circuit when the car engine is warmed
up.
Learn More About OBD Error Code P2237
The
job of the oxygen sensor of your vehicle is basically to measure the oxygen
content in the exhaust gases. These are the gasses that have been let out after
the combustion process has taken place. In order to maintain an efficient fluid
economy, the Powertrain Control Module monitors it constantly. Whenever the PCM
is able to detect a malfunction of the sensor it will set the P2237 code and
the check engine light will also be turned on. This will help the driver know there’s
an issue that requires attention. Read on to know more about what causes this
issue, how to diagnose it and finally resolve the code.
What
causes this problem with the O2 Sensor Positive Current Control Circuit/Open
Bank 1 Sensor 1?
- There's
an open circuit in the O2 sensor in the heater circuit internal of the sensor
- There’s
a short going from the heater power relay to the O2 sensor circuit ground
- Presence
of damaged to the wiring and connector of the O2 sensor
Replace/Repair These Parts To Fix Code P2237
- Powertrain Control Module - The PCM is central processing unit of your vehicle and overlooks the functioning of all the modules of your car. It sets the error codes whenever an issue is detected. Repair or replace as needed to get rid of the P2237 code.
- Oxygen Sensor - Being part of the exhaust system the oxygen sensor is responsible for recording the amount of oxygen present in the exhaust. Find the perfect sensor for your vehicle on PartsAvatar and avail free shipping on order costing above CAD $99.
- Digital Volt Ohm Meter - Is an electronic measuring instrument which combines different measurement functions into one unit. Use the DVOM during diagnosis, purchase one if you don’t already have one.
- Exhaust System - This is a system consisting of all the piping which directs exhaust gases away from the combustion of the engine. Always opt for repairs first and see if the P2237 code still persists. If that’s the case then the only resolve would be to replace it Order online from PartsAvatar and track your order till it reaches you in just few days.
- Engine Control Module - Is the brain of your vehicle's engine management system. Any engine related symptoms like an engine misfire, engine stalling etc. are a sign that your ECM isn’t functioning properly. You can repair it and see if the P2237 code goes away otherwise find the perfect replacement on PartsAvatar.
Symptoms Of OBD Error Code P2237
It is essential to know the symptoms of an issue as only then you
would be able to solve the problem. So that’s why we have listed out some major
symptoms of OBD Code P2237 here:
Common Symptoms
- The P2237 code is set
- Check engine light is on
- ECM potentially enters into failure mode fuel control (not for all
makes)
- Engine shows issues with drivability
How To Correct P2237 O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1
Here are some ways with the help of
which you will be able to correct the OBD Code P2237
- Replacing the O2 sensor which is
having short circuits
- Repair or replace the wiring
connector or other electrical components showing issues
- Check the power relay of the heater for any burned out or shorted circuit, repair or replace accordingly
There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have high grade PCM, Oxygen Sensor, Digital Volt, Ohmmeter, Wiring Harness, Exhaust System, Exhaust Gases, Exhaust Leak, ECM and a lot more for our precious customers.
Easy Diagnosis Of Engine Error OBD Code P2237
Here are some steps which you should follow in order to diagnose this fault code:
Connect
the scanner to the diagnostic port and retrieve all the codes that have been
saved, freeze them the data.
Now
check if the O2 sensor heater circuit is having the same input and control
voltages are the other O2 sensors Inspect thoroughly the O2 heater circuit for
any damages or open or short circuit that may be present in the sensor
It’s
now time to test the O2 sensor wiring and rule out if there are any shorts to
the ground or power relay. Continue inspection to the wiring harness and note
any circuit issues. These will have to be repaired or replaced as needed. After
each repair ensure you clear the codes and see if the repair/replacement was
successful.
Common
Mistakes When Diagnosing the P2237 Code
- Not making note of the codes that were present or not freeze framing the data
- Replacing
the Oxygen sensor without verifying if it had failed