U0420 on GMC CANYON — Invalid Data Received From Power Steering Control Module A

Q: "What does U0420 mean on a GMC CANYON?"

"U0420 indicates: Invalid Data Received From Power Steering Control Module A. This is a network communication code. 2 GMC CANYON owners have reported this to NHTSA."

Q: "What are the most common causes of U0420 on GMC CANYON?"

"Based on 2 NHTSA reports, the most commonly cited components are: Steering,Electrical System, Steering,Service Brakes. These percentages are based on the component field in owner complaints."

Q: "Is U0420 serious on my GMC CANYON?"

"Of 2 NHTSA reports for this code on GMC CANYON, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my GMC CANYON shows U0420?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What U0420 Means on Your GMC CANYON

U0420 is a diagnostic trouble code indicating: Invalid Data Received From Power Steering Control Module A. This code relates to the network communication system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 GMC CANYON owners have reported this issue to NHTSA across model years 2015-2016. Most reports come from the 2015, 2016 model years. The most commonly reported component is Steering,Electrical System (50.0% of reports).

Real GMC CANYON Owner Reports

Source: NHTSA Complaints Database

"Would randomly experience loss of electrical power steering assist. loss of assist would happen at all times, while stationary, while driving straight, while turning, at hi low or no speeds. needed to park vehicle and turn off and restart vehicle to restore power steering assist."

— 2015 GMC CANYON owner · STEERING,ELECTRICAL SYSTEM · Filed 08/13/2018

"Driving down the road and power (electric) steering goes out. Power steering and traction control warnings lit up on the display. Almost impossible to steer without power steering. I am lucky that this didn't cause an accident-- very scary."

— 2016 GMC CANYON owner · STEERING,SERVICE BRAKES · Filed 12/19/2023

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'15

1

'16

Common Causes on GMC CANYON

Based on NHTSA complaint component analysis for this vehicle.

STEERING,ELECTRICAL SYSTEM 50%

STEERING,SERVICE BRAKES 50%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does U0420 mean on a GMC CANYON? ▾

U0420 indicates: Invalid Data Received From Power Steering Control Module A. This is a network communication code. 2 GMC CANYON owners have reported this to NHTSA.

What are the most common causes of U0420 on GMC CANYON? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Steering,Electrical System, Steering,Service Brakes. These percentages are based on the component field in owner complaints.

Is U0420 serious on my GMC CANYON? ▾

Of 2 NHTSA reports for this code on GMC CANYON, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my GMC CANYON shows U0420? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.

U0420 on Other Vehicles

→ All codes reported on GMC CANYON