U0060 — Vehicle area network (VAN) data bus D (-)- open circuit

Introduction:
The diagnostic trouble code (DTC) U0060 indicates an issue with the Vehicle Area Network (VAN), specifically the data bus D line, which has an open circuit. This means that the communication pathway linking various electronic modules within the vehicle is interrupted or discontinuous. While the exact label may vary depending on the vehicle manufacturer, this code generally points towards a communication problem affecting the VAN system.

Fast Facts:

System affected: Vehicle Area Network (VAN)
Severity: Moderate to High, depending on vehicle functions
Main symptoms: Communication failure among control modules, warning lights
Driveability: Limited / No

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Manufacturer variations for trouble code U0060

Different automakers may assign unique labels or codes for similar VAN network issues, but U0060 is a generally recognised standard code in many vehicle diagnostic systems when dealing with VAN D line issues.

For example, some manufacturers may label this as CAN Bus D Line Open Circuit.
Others might refer to it as Vehicle Network Bus D Circuit Malfunction.
Some OEMs may specify the issue on the Communication Bus D (VAN D) or similar nomenclature.

It is important to always cross-reference manufacturer specific repair information when available to pinpoint the exact terminology.

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What does trouble code U0060 mean?

U0060 indicates that the Electronic Control Units (ECUs) within the vehicle’s network are unable to communicate via the VAN data bus D line. This data bus is a communication pathway used by different modules—such as the engine control module, transmission control, ABS, and others—to exchange vital information.

When the ECU detects that the **VAN data bus D line** is open or interrupted, it logs this code. An open circuit means that the wire or connector responsible for transmitting data on this line is broken or disconnected, preventing signals from reaching their destination.

The trigger for this code is typically an absence of communication between modules expected to interact through this bus line. It often appears in situations where electrical wiring has been disturbed, or internal faults within the modules or connectors exist.

Common contexts for this code include after recent repair work, exposure to moisture or corrosion, or the presence of electrical anomalies that cause the bus line to open.

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Severity and risks of trouble code U0060

The severity of U0060 can vary depending on the vehicle’s design and its reliance on the VAN network for critical systems. Generally, an open circuit in the VAN data bus D can lead to a loss of communication between control modules, which may cause multiple systems to malfunction or become inoperative.

Potential risks include loss of engine control functions, failure of safety systems like ABS or airbag deployment, and compromised vehicle diagnostics, which could hinder further repairs or safety assessments.

**Can the vehicle be driven?**
Typically, this depends on the severity of the communication failure. In many cases, the vehicle may still start and operate in limited mode, but some functions will be impaired. It is advisable to avoid extended driving until the issue is diagnosed and repaired, especially if safety-critical systems are affected. As a rule of thumb, the vehicle should be considered as having **Limited driveability** or **No driveability** until resolved.

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Symptoms of trouble code U0060

When U0060 is active, several symptoms may manifest, often as a consequence of lost communication between vital modules. The driver might observe warning lights on the dashboard, such as the **check engine light** or other module-specific indicators, along with intermittent or complete loss of certain vehicle functionalities.

Common symptoms include:

Warning lights illuminating on the dashboard
Malfunction or failure of safety systems like ABS or airbags
Engine or transmission performance issues
Intermittent or no response from certain control modules
Difficulty in diagnosing other system problems due to communication failure

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Most likely causes of trouble code U0060

Understanding why this code occurs helps focus diagnostic efforts. While causes can vary, several common issues are typically responsible for the open circuit on VAN data bus D.

This list ranks causes from the most to least common:

Broken or damaged wiring harness: The wiring for the VAN D line may be fractured, chafed, or physically damaged, resulting in an open circuit.
Corrosion or poor connections: Rust, dirt, or corrosion at connectors or terminals can interrupt the data flow.
Faulty control modules or ECUs: A malfunctioning module or control unit could cause communication issues or signal disruptions.
Abnormal voltage or electrical supply issues: Voltage fluctuations, grounding problems, or power supply faults can affect data transmission.
Recent repair or modification work: Incorrect wiring or connections during repairs may lead to open circuits.

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How to diagnose trouble code U0060

Diagnosing U0060 involves systematic inspection and testing. Since this code pertains to communication wiring and modules, following a logical procedure ensures a safe and effective diagnosis.

Generic diagnostic steps include:

Visual inspection: Examine the wiring harnesses, connectors, and terminals associated with the VAN D line for damage, corrosion, or loose connections.
Check for shorts or open circuits: Use a multimeter to test continuity across the VAN D line wiring, ensuring the circuit is intact from the control module to the network bus.
Inspect related fuses and relays: Confirm that power supplies to network modules are functioning properly.
Retrieve live data: Use a compatible scan tool to monitor communication status and network activity on the VAN bus D line.
Check for other related codes: Scan the vehicle for additional DTCs that might give clues on the affected modules or related wiring issues.

Always follow manufacturer-specific procedures when available, especially concerning the vehicle’s special modules and network architecture.

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Possible repairs for trouble code U0060

Correcting U0060 often involves restoring the integrity of the VAN data bus D line, which requires identifying and fixing the underlying cause. Repairs should be performed by qualified technicians, particularly if they involve wiring or module replacement.

Potential repairs include:

Replacing damaged wiring or connectors: Repair or replace fractured, chafed, or corroded wiring harness sections. (Basic repair)
Cleaning or tightening connections: Eliminate corrosion and secure loose connectors to ensure proper contact. (Basic repair)
Replacing faulty modules: If a control module or ECU is malfunctioning and causing communication issues, it may need replacement. (Professional repair)
Addressing grounding issues: Fix or upgrade grounding straps and points for stable voltage levels on the network.
Re-routing wiring: If wiring routing or routing damages are suspected, re-routing or adding protective clips may be necessary.

Ensure that all repairs are carried out in accordance with manufacturer standards to prevent recurrence of the issue.

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Vehicles commonly associated with trouble code U0060 in Europe

In Europe, U0060 can affect various makes and models, particularly those heavily reliant on VAN networks for multiple control modules.

**Vehicle makes and models known to exhibit VAN-related issues include:**

Volkswagen Group (Volkswagen, Audi, SEAT, Škoda)
BMW
Mercedes-Benz
Peugeot
Citroën
Ford

The specific impact varies across vehicle families, but the commonality remains the importance of network communication.

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Frequent mistakes with trouble code U0060

Diagnosing and repairing U0060 can be complex, and mistakes may lead to prolonged downtime or improper fixes. Common errors include:

Jumping straight to module replacement without thorough wiring inspection
Failing to verify power and ground supplies before testing the communication lines
Ignoring related codes or symptom clues that could narrow down the cause
Using improper testing tools or incorrect testing procedures, risking damage to modules or wiring
Overlooking simple fixes such as cleaning contacts or tightening loose connections

A methodical, educated approach prevents misdiagnosis and ensures cost-effective repairs.

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FAQ — trouble code U0060

Can this code disappear on its own?

U0060 does not typically clear itself without intervention once the wiring or component fault is present. However, temporary connection disturbances might cause the code to reset after a successful repair or disconnection of the fault source.

Can I keep driving?

If the vehicle remains operational, it may be possible to drive temporarily, but caution is advised. Since communication failures can impact safety systems, prolonged driving with this fault is not recommended. Always seek professional diagnosis to confirm if the vehicle is safe for continued use.

Why does the code return after clearing?

The code reappears because the underlying fault—such as a broken wire or a malfunctioning control module—has not been repaired or masked temporarily. Persistent wiring issues or faulty modules will re-activate the code once the vehicle’s ECU performs its regular checks.

This comprehensive diagnostic sheet aims to guide both technicians and informed vehicle owners towards understanding, diagnosing, and addressing the U0060 trouble code effectively, ensuring safety and reliable vehicle operation.