C0237 Chevy Silverado (Meaning, Causes, and Fixes)

Modern Chevy Silverado users often claim to notice a C0237 code on their vehicle, but do you know what this C0237 code means and what causes this code to pop up suddenly?

The C0237 is a generic engine trouble code to notify about trouble in the Electronic Brake Control Module Relay Circuit (EBCM) and indicates about Crankshaft Position Sensor B Circuit malfunction or failure.

Are you still confused about what to do when you see the C0237 code on your Chevy vehicle? Do not panic because I will be explaining everything you should know about this C0237 DTC code and how to quickly fix it.

C0237 Code on Chevy Silverado

What Does C0237 Code Mean on Chevy Silverado?

One of the common scenarios with the most modern Chevy users is that when the vehicle runs above 40 to 50 MPH suddenly the ABS and brake indicator pop up.

The C0237 means Encoder Circuit Malfunction, and due to incorrect speed measurement, it can simply show up on any vehicle, including the Chevy Silverado.

But before explaining more details, first find out the dissection of thee C0237 code:

  • C- Engine’s OBD II Diagnostic Chassis (C) Trouble Code.
  • 0- Intake Valve Control Solenoid Circuit Low
  • 2- Ambient Air Temperature Sensor Circuit Low
  • 3- Cold Start Injector 1 Malfunction
  • 7- Crankshaft Position Sensor B Circuit Malfunction

When your vehicle scanner is showing the C0237 code on, it means ECM is failing to send the correct signals to your vehicle to deliver the required amount of speed.

Such commotion commonly arises due to either the Ambient Air Temperature Sensor Circuit or Cold Start Injector 1 malfunctioning or failing.

The engine’s oxygen/ 02 Sensors are responsible for calculating the oxygen (air) in the exhaust and based on that measurement it determines how rich or lean the air-to-fuel ratio is in the engine cylinders.

If the air-to-fuel mixture is optimized, it means your vehicle has better fuel economy and emits fewer emissions.

So, there is nothing to worry about, but if the measurement shows an imbalance in that Fuel & air measurement, it will decline the engine’s overall performance.

What Does the Crankshaft Position Sensor B Do?

In this process, the Crankshaft Sensor first calculates the Crankshaft location, and just like Oxygen Sensor, it sends the accurate information to the PCM so that the Powertrain Control Module can make proper adjustments or act accordingly as needed.

Also, when the Crankshaft Position Sensor B Circuit fails or malfunctions, it will give the vehicle starting trouble, running rough problems, and misfiring or backfiring issues.

Is C0237 Code On Chevy Silverado A Critical Problem To Consider?

Unfortunately, this C0237 code should be taken seriously, and take necessary actions as soon as possible until you would like to experience terrible engine starting problems, engine misfire, rough running, or idling.

What Causes Code C0237 On Chevy Silverado?

Check out the potential causes behind the C0237 code on your vehicle:

  • It might be causing a lousy, defective, or fouled Rear Speed Sensor (RSS) because the RSS can get affected when something goes wrong with the Transmission system and it does not work accurately.
  • Even any issues with the Rear Speed Sensor harness or connecting wires can also lead the PCM to trigger the C0237 code.
  • If the Rear Speed Sensor wiring is open, shorted or Electronic Brake Control Module has a poor, worn, or broken electrical connection.
  • Besides the Ambient Air Temperature Sensor Circuit turning significantly low, a malfunctioned ECM or PCM can also send false signals.
  • Also, a malfunctioned or failed Electronic Brake Control Module will calculate the ratio information incorrectly, and send the wrong signals to cause such commotion.

Typical Symptoms Of Getting C0237 Code On Chevy Silverado

Let us have a look at the potential symptoms that can give you a heads-up about the C237 code & potential problem:

  • You might notice Anti-Lock Brake System (ABS) Warning Light staying on
  • Check/ Service Engine Light illuminating can be another typical sign of getting C0237, but this warning light turns on due to other internal or external errors too. So, a better diagnosis first to confirm the problem.
  • You might notice that your vehicle engine suddenly does not want to start and if starts, rather than running smoothly, it will start running rough.
  • Even you might also notice rough or hard idling.

How To Fix The C0237 Code On The Chevy Silverado?

After noticing the C0237 error code on your Chevy Silverado vehicle, follow below explained effortless steps to get rid of that trouble code-

Video: How to Fix CHEVROLET C0237 Code by Replaceing the Vehicle Speed Sensor

Required Tools or Items
New 4WD Speed Sensor
19 Millimeter Wrench
Jack & Jack Stands

1. Locate your 4 Wheel Drive Speed Sensor & Remove it

This is the area where your vehicle’s 4WD Speed Sensor is located.

Now just lift this tab up over there and pull the harness free.

Next use a 19 mm (about 0.75 in) wrench to twist the Sensor out and remove the Sensor by twisting it a little bit.

2. Replace the Four-Wheel Drive Speed Sensor

Then compare the Sensor. Here, the left one is the old on that you just took off and the right side one is the new Four-Wheel Drive (4WD) Speed Sensor .

Make sure they are identical and the new one can fit into the place just as needed.

Now push the new Speed Sensor down into the place and twist it in and tighten it with the wrench securely.

Then, reconnect the harness tab properly and your replacement task is complete.

How Much Does It Cost To Fix The Chevy Silverado C0237 Code?

Remember, the exact cost varies highly depending on your vehicle’s model, damage level, the current price of the replacement parts you need to fix, and the local labor rate of your servicing area.

The labor cost ranges between $75 and $150 per hour, including the one-hour diagnosis cost that the mechanic will perform.

However, if you perform the diagnosis & repair or replacement by yourself, you will only have to spend money to purchase the parts.

If you take your Chevy Silverado to the repair shop and find out that only the Vehicle Speed Sensor is severely damaged, this replacement might cost $200 up to $350 (including parts & labor expenses).

Frequently Asked Questions (FAQs)

Where is the Ambient Air Temperature Sensor Circuit Located on Chevy Silverado?

The Ambient Air Temperature Sensor is usually mounted inside or near the front bumper of your vehicle’s passenger compartment.

Where is the Cold Start Injector 1 On My Chevy Silverado?

The Cold Start Injector 1 is assembled in the middle of the upper intake manifold plenum of your engine.

Can I Drive My Chevy Silverado with The C0237 Code On?

No, you should not.

Where is the Crankshaft Position Sensor B Circuit On My Chevy Silverado?

Usually, the Crankshaft Position Sensor (CPS) B Circuit is located on the exhaust side of the engine cylinder head.
But to confirm the exact location to access and inspect the CPS B Circuit, check your vehicle model’s user/service manual.

Final Thoughts

From its meaning to fixing the issue with easy technique, I already explained everything in detail regarding this C0237 error code.

Thus, the next time you see C0237 code popping on your vehicle scanner screen, do not worry about what to do cause I already explained everything in details. So just follow the directions thoroughly without skipping a bit.

However, if the solution mentioned in this article fails to clear this code on your vehicle, immediately contact a professional mechanic.

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