Chrysler 300 esp

Chrysler 300 esp DEFAULT

Q: ESP BAS light on

asked by

Sharon L

on September 29, 2017

i have an 06 300 touring and the EPS BAS light is on. It would go out for a day or two and now it seems to be staying on. What would the average cost be to have this repaired

My car has 66000 miles.
My car has an automatic transmission.

Your Electronic Stability Program (ESP) Indicator Light / Brake Assist System (BAS) Warning Light is a common issue with Chrysler. Start with checking the electrical system. Remove the battery cables and clean them well. Next, check the ground connection at the bulkhead, under the hood and the positive connections at the fuse box. If all that checks out OK, check under the main fuse box for loose / corroded plugs and wires. These are the known, common problems. The fluctuation in power would cause the PCM to momentarily go into limp mode causing a bit of bucking or jerking on deceleration. Also have the OBD trouble codes read, including the ABS system. To reset the ESP/BAS light, with the engine running, in park turn the wheel right to left, lock to lock twice.

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Electronic Stability Program

Electronic Stability Program or ESP is the name given by the Chrysler corporation to the electronic driver’s aids that are used to help motorists keep their vehicles under control when faced with inclement weather conditions or extreme driving situations. Introduced in 2004, ESP was first available exclusively on the Chrysler 300 and Dodge Magnum. The reason these vehicles were chosen to roll out the technology is because at the time, Chrysler had merged with Mercedes and formed the DaimlerChrysler corporation, and the LX platform upon which they were based was in fact adapted from the Mercedes-Benz E-Class. Mercedes had been perfecting their ESP technology since 1995, and the years of development directly benefited these Chrysler products. The German auto manufacturer had long claimed that the Electronic Stability Program had played a significant role in reducing the number of serious accidents that their vehicles had been involved in. In 2006, Chrysler announced that they would be installing the system on an additional 1.2 million vehicles, with the eventual goal of covering 70 percent of their vehicle lineup.

How ESP works

The Electronic Stability Program from Chrysler is a fairly complex piece of engineering. The aim of this system was to move beyond a safety program which was only active during acceleration. ESP is armed as soon as the vehicle is started, and sensor data is gathered at all times. This data is fed into an active computer model which compares the standard behavior of the vehicle’s driver against the actual driving situation as reported by the sensor information. The model is adaptive and learns the driving habits of the vehicle owner, using this information to generate the baseline of safe values to use for comparison purposes. Through this methodology, the ESP system is designed to rapidly react to any deviations between expected values and the condition of the vehicle. This computer model sets the Chrysler Electronic Stability Program apart from other, more basic brake and throttle management stability control systems.

Information such as vehicle speed, braking intensity, pitch and yaw and traction are all taken into consideration. Wheel speed is determined by the same sensors that are used to help the anti-lock braking system (ABS) system choose where braking force should be applied. Steering angle is measured by a sensor in the steering column that notes the position of the steering wheel relative to the actual direction of the vehicle as determined by the yaw sensor. A sensor measuring the lateral acceleration of a vehicle is used to ascertain if the vehicle is in the middle of a skid or not. All of these factors are calculated extremely rapidly by the central processing unit of the ESP system, since at highway speeds even milliseconds can result in a significant amount of distance traveled.

How ESP can help

If the Electronic Stability Program determines that intervention is needed, it can respond in a variety of ways to ensure the continued safe operation of the vehicle. ESP can reduce engine power, thus eliminating wheel spin and slowing down the vehicle in a low-traction situation. It can also take multiple steps to correct a skid or slide, such as individually applying the brakes to each wheel in order to prevent the vehicle from rotating or building enough inertia to roll over. It can also take the extreme option of both applying the brakes and cutting power to bring the vehicle to a complete stop, should it decide that conditions are too treacherous to continue driving.

A common misconception is that stability control programs use the ABS system in order to control the braking pressure at each wheel. In reality, ESP must increase braking pressure individually, while an ABS system reduces the braking pressure of an individual wheel while maintaining uniform pressure for the remaining brakes. This means that the Electronic Stability Program requires a separate brake modulator.

Disabling ESP

ESP is now a common feature in Chrysler and Dodge vehicles, and in most of these cars it cannot be completely disabled. Unlike other stability programs on the market, pushing the button on the dash to ‘deactivate’ the system merely lowers its sensitivity. In the case of extreme wheel spin or radical lateral movement, ESP will kick in to reign the vehicle back under control. In order to completely remove the Electronic Stability Program from the equation, it is necessary to pull a fuse underneath the hood of the car. In response to consumer demand, some of Chrysler’s more performance-oriented vehicles are now being outfitted with an ESP system which does not require such an extreme step in order to be turned off completely.

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The ESP BAS light is a trouble indicator light that indicates that there is an issue with your Chrysler 300’s Electronic Stability Program (ESP) and/or your Brake Assist Program (BAS).  These systems are important to the safety of your 300.  Fixing them should be a top priority.  We cover how to diagnose the ESP BAS light and the common causes below.

ESP BAS Light Chrysler 300


Chrysler 300 ESP BAS Symptoms

You really won’t feel any of the symptoms of the ESP BAS system not functioning as you drive normally.  You will notice they aren’t there in an emergency situation though.

Here are the most common symptoms of the ESP BAS system not functioning properly in the 300.

  • ESP BAS Light
  • NO ABS
  • Traction Control Deactivated


ESP BAS Light Causes:  Chrysler 300

Just like with any other major vehicle problem, you’re going to want to get a reading of your 300’s diagnostic trouble codes.  You can use a good code scanner, or you can take it to the local parts store and see if they will scan it for you.  Most of them are happy to do so.

You’ll want a scanner that can read the codes from your wheel speed sensors, ABS, and chassis.  If you do opt to purchase a code scanner, just be aware that the cheaper ones only read the engine codes.  That’s fine most of the time, but the problem causing the ESP BAS light is not going to be engine related.

Once you get the codes, it’ll narrow down what you need to repair.  Here are the most common causes of the ESP BAS light coming on:


Steering Angle Sensor

The steering angle sensor is one of, if not the most, common causes of the ESP BAS light to come on.  As mentioned above, make sure to turn the steering wheel twice to the right, twice to the left, and finally back to the center.  This resets the steering angle sensor in your 300.


Wheel Speed Sensor

The ESP and BAS systems measure the speed of all four of your 300’s wheels.  When the wheel speeds are no longer equal, they will apply corrective measures to make sure that you stay in control of the vehicle.  These are easy to replace, and have their own diagnostic codes, that’s why a scanner is so important.


Brake Switch

Something as simple as the brake switch is known to cause the ESP BAS light to come on.  Replacing it is simple and cheap.

Chrysler 300

Is it Safe to Drive with Your 300’s ESP BAS Light on?

Is driving with the ESP BAS light on going to leave you stranded on the side of the road?  No it is not.  Is it safe?  It’s not as safe.  It’s like driving a vehicle from the 70’s that doesn’t have traction control or ABS.  You don’t always need these systems, but when you do they can save your life and keep you from crashing.



  • The ESP BAS light is letting you know that vital safety equipment in your 300 is not working.
  • Before doing anything else, make sure to cut the wheel all the way right twice, left twice, and then to the center.  This can recalibrate the steering system (see video above).
  • An OBDII scanner will tell you which component is causing the light to come on.
  • It’s usually a sensor that ends up needing replaced
  • Repair it as soon as you can.

Thank you for reading.  If there’s something you would like to add, please leave a comment below.  Good luck.


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