What Does U2016 Mean?
A communication signal wire is shorted to ground, pulling down the network voltage and preventing proper communication. This specifically may involve the NGV (Natural Gas Vehicle) module circuit in applicable vehicles.
Common Causes
45%
Damaged wire insulation causing short to chassis ground or metal component
25%
Connector terminal corrosion causing internal short to ground within connector housing
20%
Failed module with internal short circuit pulling bus line to ground
10%
Water intrusion in connector or module causing short circuit path
Diagnostic Steps
1
Step 1: Measure resistance from CAN High and CAN Low to ground separately (should be 60 ohms each, not near 0 ohms)
2
Step 2: Disconnect modules one at a time to isolate which module or circuit segment contains the short
3
Step 3: Inspect wiring harness routing for areas where wires contact sharp edges, hot components, or moving parts
4
Step 4: Check for damaged wire insulation, particularly at harness entry/exit points through firewalls or body openings
5
Step 5: If NGV module is present, inspect that module and its connections first as code description suggests involvement
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
A communication signal wire is shorted to ground, pulling down the network voltage and preventing proper communication. This specifically may involve the NGV (Natural Gas Vehicle) module circuit in applicable vehicles.
The most common cause of U2016 (Signal Link Short to Ground (Non SCP) / From NGV Module) is: Damaged wire insulation causing short to chassis ground or metal component
Typical repair costs for U2016 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Communication failure can affect safety systems including ABS, airbags, and engine control. Vehicle may enter reduced power mode. Professional diagnosis recommended.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U2016 to identify the root cause.
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Quick Info
Category
Network
System
Communication Network
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
