The C0021 Dodge Code is a diagnostic trouble code (DTC) that indicates a possible failure in the performance of the brake booster. This code can be caused by a variety of issues, ranging from a faulty brake booster to a wiring harness issue.
It is important to diagnose and fix the issue as soon as it is detected to avoid further damage or costly repairs. In this article, we will discuss the possible causes, symptoms, and steps to diagnose and repair the C0021 Dodge Code.
Key Takeaways
- The C0021 Dodge code can be caused by a faulty brake booster or vacuum pressure sensor, as well as issues with the wiring harness and connectors.
- Symptoms of the C0021 Dodge code include illuminated ABS and engine warning lights, decreased brake performance, and poor fuel economy.
- Diagnosing the C0021 Dodge code involves visually inspecting the wiring harness and connectors, checking for damaged components, and searching for Dodge Factory Service Bulletins and safety recalls.
- To repair the C0021 Dodge code, a thorough visual inspection of the wiring harness and connectors is necessary, along with addressing any open or shorted vacuum pressure sensor harnesses and fixing any faulty brake booster or vacuum pressure sensor.
Diagnosing C0021 Dodge Code
Diagnosing the C0021 Dodge Code requires a visual inspection of the wiring harness and connectors, as well as a check for any damaged components or corroded pins. Common causes of this code include a faulty brake booster, vacuum pressure sensor, or vacuum pressure sensor harness.
Symptoms of the code may include the ABS warning light or engine light being illuminated. Troubleshooting steps include checking for safety recalls, and inspecting the wiring and connectors.
The meaning of this code indicates a failure in the vacuum booster, and the pressure should remain above -200 mbar for two minutes.
The cost of diagnosis typically ranges from $75 to $150 per hour.
Symptoms of C0021 Dodge Code
The C0021 Dodge Code may present symptoms such as an Anti-Lock Brake System (ABS) Warning Light being illuminated, or an Engine Light being activated. Other causes of this diagnostic trouble code (DTC) can include a faulty brake booster, a faulty vacuum pressure sensor, or a vacuum pressure sensor harness that is open or shorted.
To troubleshoot this code, it is important to visually inspect the wiring harness and connectors, check for damaged components, and search for Dodge Factory Service Bulletins for the C0021 code. Solutions may include replacing the faulty part or component, or repairing the wiring harness or connectors.
It is also important to make sure that the vacuum pressure remains above -200 mbar (-2.90 psi) for at least two minutes, and that the timer resets if pressure remains above 220 mbar (3.19 psi) for 10 seconds.
Repairing C0021 Dodge Code
Repairing the C0021 diagnostic trouble code requires a thorough visual inspection of the wiring harness and connectors, as well as a check for damaged components and factory service bulletins.
Troubleshooting steps should include checking for open or shorted vacuum pressure sensor harnesses, poor electrical connections, and common causes such as faulty brake boosters and vacuum pressure sensors.
If necessary, replacing the vacuum pressure sensor or brake booster can address brake booster issues, while fixing the code should reset the timer and bring the minimum differential pressure above -200 mbar (-2.90 psi).
Following these steps should help to repair the C0021 code and restore proper brake booster performance.
Prevention of C0021 Dodge Code
Regular maintenance and inspection of the vacuum pressure sensor and brake booster can help prevent the C0021 diagnostic trouble code.
Common causes of the C0021 Dodge code include faulty brake boosters, vacuum pressure sensors, and open or shorted vacuum pressure sensor harnesses.
To troubleshoot the C0021 Dodge code, check for damaged components, broken, bent, pushed out, or corroded connector pins, and inspect the wiring harness and connectors.
Tips for maintaining the brake booster include checking the safety recalls for Dodge, inspecting the ABS warning light, and keeping an eye on the engine light.
Possible consequences of ignoring the C0021 Dodge code include decreased brake performance and poor fuel economy.
If the C0021 Dodge code keeps recurring, it is recommended to visit a mechanic for an inspection and diagnose the issue.
Video Help Brake Booster Replacement
This is a video by the Youtuber Reuban Sahstrom and he does this 6-minute video on how to replace a brake booster on a 2015 Dodge Ram 3500. Even if you have a different make and model this will give you some needed information and understanding. Click the red play button below to watch it.
Frequently Asked Questions
What Other Models of Dodge Vehicles Are Affected by the C0021 Code?
The C0021 code commonly affects various models of Dodge vehicles, and preventative maintenance such as checking brake fluid levels, performance upgrades, booster replacement, and using diagnostic tools can help to identify the issue. It is important to address the issue quickly in order to maintain proper performance and safety.
Are There Any Recalls Related to This Code?
Yes, there are potential recalls related to the C0021 code. Consumers may be eligible for recall prevention, warranty coverage, error resolution, technical support, and repair costs. It is important to contact your local Dodge dealership to determine eligibility and to discuss any potential recalls.
Is There a Specific Make and Model of Brake Booster That Is Recommended for Use When Repairing This Code?
When repairing a C0021 Dodge Code, it is important to consider brake booster quality, replacement options, and maintenance tips. Common symptoms include ABS warning light and engine light on. Proper diagnosis techniques should be used to determine the best replacement option. Quality brake boosters should be used for a successful repair.
Are There Any Special Tools Required for Diagnosing and Repairing the C0021 Code?
To diagnose and repair the c0021 code, special tools may be needed such as cleaning components, professional diagnostic software, and a check engine light reader. To ensure the best results, following a maintenance schedule and obtaining a professional diagnosis is highly recommended.
Are There Any Other Warning Signs That May Indicate a Problem With the Brake Booster Before the C0021 Code Is Triggered?
Common warning signs of a faulty brake booster installation or performance issues can include safety hazards, maintenance programs, driving habits, and performance issues. Pay special attention to any changes in braking power or response, as this could indicate a problem with the brake booster.
Final Thoughts
In conclusion, the C0021 Dodge Code is a diagnostic trouble code that can indicate a failure in the brake booster performance. Diagnosing this issue requires careful examination of the potential causes and symptoms, as well as the necessary steps to repair the issue.
It is important to note that potential causes and symptoms may not be complete, and there may be other underlying issues. By understanding the potential causes and symptoms, as well as the repair process, drivers can take the necessary steps to prevent this code from appearing in the future.
