U0435 code meaning
Invalid Data Received From Power Steering Control Module - Rear
What U0435 means
U0435 refers to the rear power steering module, the controller of active rear-wheel steering. A receiver sets it when the module's status or angle frames arrive but are unusable. GM bulletin 17-NA-130 explains one case on the 2016-17 Cadillac CT6: during a remote start the rear steer module had not yet initialised while the brake module already expected its data, so the EBCM stored U0435 and showed a Service Soon message; new EBCM software is the fix. Porsche's workshop campaign WE14 for the 2014 911 Turbo reflashes both rear-axle steering units after a software error; with the fault active the actuators lock in the straight position and the car behaves like one with fixed rear links until the next ignition cycle. U0134 is lost contact; U0420 covers power steering module A.
U0435 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.3 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0435
- Service Soon or rear steering fault message
- Larger turning circle, rear wheels held straight
Common causes of U0435
- Most likelyRear steering module not yet ready when receivers expect data, e.g. at remote start
- PossibleSoftware error in rear steering or brake module
- Less likelyLow voltage or poor connector at the rear steering unit
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Rear power steering module
What each part of U0435 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 35 | The exact fault in that area. |
What to do next
- Note U0435 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0435
What does U0435 mean?
U0435 means "Invalid Data Received From Power Steering Control Module - Rear". U0435 refers to the rear power steering module, the controller of active rear-wheel steering. It is a generic code, so it means the same on every make.
Is it safe to drive with U0435?
Drive gently and only to a workshop. With U0435 the car can go into limp mode (reduced power) to protect itself.
Will U0435 fail an emissions test?
U0435 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0435 to fix?
Difficulty: workshop only. A typical repair takes 0.3 to 2.5 hours of work. This is a job for a workshop.
Will U0435 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.