U0134 Code: Meaning, Symptoms, Causes & Fix

Overview

Symptoms

• longer braking intervention
• ABS/traction light on
• chassis warning indicator

Common causes

• CAN bus wiring fault affecting lost communication with power steering control module rear
• Network termination or gateway fault
• Connector pin damage/corrosion or harness stress near related components

How to diagnose U0134

1. Confirm U0134 and capture freeze-frame data with a professional scan tool.
2. Inspect wiring, connectors, and grounds related to lost communication with power steering control module rear for obvious defects.
3. Check CAN high/low integrity, network termination resistance, and module wake-up status.
4. Check for related DTCs to identify the root-cause chain before replacing parts.
5. After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code U0134

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with U0134?

Most vehicles can be driven short-term with U0134, but postpone heavy load/highway driving until repaired.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

1. Repair obvious wiring/connector faults first to prevent repeat parts replacement.
2. Address the root fault mode (communication) in the lost communication with power steering control module rear circuit/system.
3. Apply the required relearn/adaptation procedure if specified by service information.
4. Road-test and verify U0134 remains cleared under the conditions that originally set the code.

Fix options

• Scan all modules for communication chain faults.
• Repair CAN high/low wiring or termination issue.
• Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$240-$1200

Common mistakes when diagnosing U0134

• Replacing parts without verifying voltage, ground, and signal integrity first.
• Ignoring related stored/pending codes that indicate upstream faults.
• Skipping post-repair verification drive cycle and readiness checks.

U0134 in common vehicles

U0134 appears across makes such as Nissan, Hyundai, Kia, Volkswagen. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes U0134?

U0134 is commonly set by communication faults affecting lost communication with power steering control module rear.

How much does it cost to fix U0134?

For U0134, repair costs are typically $240-$1200 depending on exact root cause, labor rates, and part quality.

Can I clear U0134 without repair?

You can clear U0134 temporarily, but the code usually returns until the underlying fault is corrected.

Helpful tools

• Estimate repair cost
• Decode your VIN
• Calculate fuel cost