What Does U0159 Mean?
The vehicle's control modules cannot communicate with the parking assist control module over the network bus. This indicates a breakdown in data exchange that prevents parking sensors and automated parking features from functioning properly.
Common Causes
35%
Faulty parking assist control module with internal failure
30%
Damaged or corroded wiring harness between control module and CAN bus
20%
Poor ground connection at parking assist module
10%
Blown fuse or open circuit in power supply to module
5%
CAN bus termination resistor failure or network short
Diagnostic Steps
1
Step 1: Verify parking assist module has power and ground using multimeter at module connector
2
Step 2: Check CAN High and CAN Low bus voltage at module connector (should see 2.5V nominal with key on)
3
Step 3: Inspect wiring harness and connectors for physical damage, corrosion, or water intrusion
4
Step 4: Use scan tool to attempt communication directly with parking assist module and check for internal module codes
5
Step 5: Measure CAN bus resistance between CAN High and Low (should be 60 ohms with system powered down)
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The vehicle's control modules cannot communicate with the parking assist control module over the network bus. This indicates a breakdown in data exchange that prevents parking sensors and automated parking features from functioning properly.
The most common cause of U0159 (Lost Communication With Parking Assist Control Module "A") is: Faulty parking assist control module with internal failure
Typical repair costs for U0159 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Parking assist features will be disabled, increasing risk of low-speed collisions during parking maneuvers. Vehicle remains safe to drive but requires extra caution when parking.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0159 to identify the root cause.
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Quick Info
Category
Network
System
Parking Assist System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
