U0437 Code - Invalid Data Received From Differential Control Module Rear
Quick Answer
A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Differential Control Module Rear, Differential Control Module Rear harness is open or shorted, Differential Control Module Rear 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
- U0437 indicates Invalid Data Received From Differential Control Module Rear.
- Common causes
- Common causes include Faulty Differential Control Module Rear, Differential Control Module Rear harness is open or shorted, Differential Control Module Rear 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 U0437 Description
What are the Possible Causes of the DTC U0437?
- Faulty Differential Control Module Rear
- Differential Control Module Rear harness is open or shorted
- Differential Control Module Rear circuit poor electrical connection
How to Fix the DTC U0437?
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 U0437 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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Information for Specific Makes
- U0437 Buick — Invalid Data Received From Differential Control Module Rear
- U0437 Cadillac — Invalid Data Received From Differential Control Module Rear
- U0437 Chevrolet — Invalid Data Received From Differential Control Module Rear
- U0437 GMC — Invalid Data Received From Differential Control Module Rear
Frequently Asked Questions about U0437 Code
1. What does OBD-II code U0437 mean?
Code U0437 indicates that invalid or corrupted data has been received from the rear differential control module by the vehicle’s main control system.
2. What are common symptoms of code U0437?
Symptoms may include the illumination of the check engine light, traction control or ABS warning lights, erratic handling, or issues with the vehicle’s AWD/4WD system.
3. What causes code U0437 to occur?
Common causes include a faulty rear differential control module, damaged wiring or connectors, software glitches in the control module, or communication issues within the CAN bus system.
4. Can I drive my car with code U0437?
While driving may still be possible, the vehicle’s traction or stability control systems might not function properly, potentially compromising safety in certain driving conditions.
5. How is code U0437 diagnosed?
A mechanic will use a scan tool to confirm the code, inspect the wiring and connectors for damage, check the CAN bus communication network, and test the rear differential control module for faults.
6. How do you fix code U0437?
Repairs may involve replacing or reprogramming the rear differential control module, repairing damaged wiring or connectors, or addressing any faults in the CAN bus system.
7. Does code U0437 always mean the rear differential control module is bad?
No, the issue could also stem from wiring problems, communication errors, or even software issues, so a thorough diagnosis is essential.
8. How much does it cost to repair code U0437?
Repair costs can range from $150 to $1000 or more, depending on whether the issue is a simple wiring fix or requires module replacement and programming.
9. Can code U0437 be caused by a dead battery?
A low or dead battery can sometimes lead to communication errors, so it’s worth checking the battery and charging system as part of the diagnosis.
10. Will clearing code U0437 with a scan tool fix the issue?
Clearing the code may temporarily turn off the warning light, but if the underlying problem isn’t resolved, the code is likely to return.
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