U1021 Lincoln Code - Lost Communication With Anti-Lock Brake System Control Module
Quick Answer
The Diagnostic Trouble Code (DTC) sets in the Powertrain Control Module (PCM) if data messages received from the Anti-Lock Brake System (ABS) Control Module over the HS-CAN2 is missing. Common causes include Faulty Anti-Lock Brake System (ABS) Control Module, Anti-Lock Brake System Control Module harness is open or shorted, Anti-Lock Brake System Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U1021 Lincoln indicates Lost Communication With Anti-Lock Brake System Control Module.
- Common causes
- Common causes include Faulty Anti-Lock Brake System (ABS) Control Module, Anti-Lock Brake System Control Module harness is open or shorted, Anti-Lock Brake System Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U1021 Lincoln Description
What are the Possible Causes of the DTC U1021 Lincoln?
- Faulty Anti-Lock Brake System (ABS) Control Module
- Anti-Lock Brake System Control Module harness is open or shorted
- Anti-Lock Brake System Control Module circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC U1021 Lincoln?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U1021 Lincoln code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about U1021 Lincoln Code
1. What are the common symptoms of OBDII code U1021 in a Lincoln indicating a lost communication with the Anti-Lock Brake System Control Module?
- Common symptoms include ABS warning light illuminated on the dashboard, loss of ABS functionality, and potential issues with traction control.
2. What are some possible causes of the U1021 code in a Lincoln?
- Possible causes can include a faulty ABS control module, damaged wiring or connectors, a blown fuse related to the ABS system, or issues with the vehicle's CAN bus communication network.
3. How can I diagnose the U1021 code in my Lincoln?
- Diagnosing the U1021 code may involve using a diagnostic scanner to retrieve the code, checking the ABS fuse for any signs of damage, inspecting the wiring and connectors for any visible issues, and conducting further tests to pinpoint the exact cause.
4. What are some repair tips for addressing the U1021 code in a Lincoln?
- Repair tips may include ensuring all fuses related to the ABS system are in good condition, checking and repairing any damaged wiring or connectors, and, if necessary, replacing the ABS control module.
5. Is it safe to drive my Lincoln with the U1021 code present?
- It is generally not recommended to drive the vehicle with the U1021 code active, as it indicates a potential issue with the Anti-Lock Brake System that could compromise your safety on the road.
6. Can a DIY enthusiast fix the U1021 code in a Lincoln, or is professional assistance required?
- While some basic troubleshooting steps can be taken by DIY enthusiasts, diagnosing and repairing the specific cause of the U1021 code may require specialized tools and expertise, making professional assistance advisable.
7. How much can I expect to pay to fix the U1021 code in my Lincoln?
- The cost of repairing the U1021 code can vary depending on the underlying cause. It is recommended to obtain diagnostics from a qualified mechanic to get an accurate estimate of the repair costs.
8. Are there any preventive measures to avoid encountering the U1021 code in the future?
- Regular maintenance of the ABS system, including checking for any signs of wear or damage, can help prevent issues that may trigger the U1021 code in the future.
9. Will resetting the OBDII code U1021 in my Lincoln make the issue go away permanently?
- Simply resetting the code without addressing the root cause will not permanently resolve the issue. It is essential to diagnose and repair the underlying problem to prevent the code from reappearing.
10. How long does it typically take to repair the U1021 code in a Lincoln?
- The repair time for the U1021 code can vary depending on the specific cause and complexity of the issue. It is advisable to consult with a mechanic to get an estimate of the repair timeline.
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