Lost Communication With Power Steering Control Module
The U0118 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Power Steering Control Module. This is a critical severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $300 - $1500 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Common Symptoms
- Power steering warning light on
- Heavy or stiff steering -- no power assist
- Electric power steering system inoperative
- Check Engine Light may also be on
- Steering may feel different at various speeds
Probable Causes (Ranked by Likelihood)
- Failed electric power steering (EPS) control module Very High
- Damaged CAN bus wiring to EPS module High
- EPS motor failure Moderate
- Faulty steering angle sensor Moderate
- Low battery voltage causing EPS shutdown Low
Step-by-Step Diagnostic Procedure
-
Scan for DTCs in the power steering and chassis modules
-
Check battery voltage -- EPS systems need at least 12V to operate
-
Inspect CAN bus wiring and connectors at the EPS module on the steering column
-
Verify power and ground supply at the EPS module
-
Check for TSBs related to EPS module failures for the specific vehicle
Frequently Asked Questions
Can I drive with code U0118?
You can drive short distances at low speeds, but steering will be very heavy without power assist. This is dangerous at higher speeds or in emergency maneuvers. Have it repaired immediately.
What causes U0118?
The most common cause is a failed electric power steering module. Low battery voltage, wiring damage, and EPS motor failure are also common causes.
Is U0118 expensive to fix?
EPS module or motor replacement typically costs $300 to $1500. The steering column assembly may need to be replaced as a unit on some vehicles, increasing the cost.
Sources
This page is built from documented references. Verify against your own service info before repair work.
Explore More
Was this helpful?
Share carcodefinder.com with a friend who needs to decode their check engine light.