What Does U0062 Mean?
The negative wire of communication bus D is reading above normal voltage threshold. This indicates a short to power or improper bus biasing affecting the CAN D- circuit.
Common Causes
30%
Short to power in CAN D- wire
25%
Faulty control module with internal short to voltage on bus pin
20%
Missing or open termination resistor causing improper voltage levels
15%
Crossed wires between CAN D- and power circuit
10%
Improper aftermarket installation creating short to power
Diagnostic Steps
1
Step 1: Measure voltage on CAN D- with ignition on; should be approximately 2.5V, not elevated toward battery voltage
2
Step 2: Check for shorts to power using ohmmeter between CAN D- and battery positive with all systems off
3
Step 3: Verify termination resistors are functioning by measuring 60 ohms between CAN D+ and CAN D-
4
Step 4: Disconnect modules systematically while monitoring voltage to locate faulty component
5
Step 5: Inspect for recent repairs or modifications that may have caused miswiring
Estimated Repair Cost
$150 - $950
Parts + labor, varies by vehicle and location
The negative wire of communication bus D is reading above normal voltage threshold. This indicates a short to power or improper bus biasing affecting the CAN D- circuit.
The most common cause of U0062 (Vehicle Communication Bus D (-) High) is: Short to power in CAN D- wire
Typical repair costs for U0062 range from $150 to $950, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Critical safety features like ABS, stability control, and airbag systems may be inoperative. Vehicle may experience no-start condition or severely limited operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0062 to identify the root cause.
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Quick Info
Category
Network
System
Vehicle Communication Network
Difficulty
Type
Generic (SAE)
Recommended Tools
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