Network, generic

U0320 Software Incompatibility With Power Steering Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

The power steering control module drives the electric assist motor and needs calibration data that suit the steering gear and the vehicle. U0320 is logged when another module refuses to work with its software. No manufacturer documents U0320 publicly, but GM and Volkswagen show the background. GM preliminary information PIC5771 for the 2013 Buick LaCrosse with NJ2 steering reports that after a gear replacement the module often refused programming and set C056E symptom 42, calibration not programmed, so Techline had to supply the data. Volkswagen cured weak assist on 2010–2013 Golf, Jetta, Passat and Beetle by new J500 software, followed by basic settings of steering and angle sensor. U0131 is lost contact, U0420 invalid data, U0319 concerns the steering effort module. Steering may turn heavy with a warning lamp.

Likely causes

Steering gear or steering module replaced without loading matching calibration
Steering module software older than required by the other modules
Basic setting or adaptation after programming not carried out
Programming disturbed by voltage drop

Symptoms

  • Steering heavy or assist only partly available
  • Power steering warning lamp or message
  • Lane keeping or park steering functions switched off

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–900
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

power steering modulecontrol module software

Related codes

U0131U0420U0319U0328

References: static.nhtsa.gov, static.nhtsa.gov, en.wikipedia.org.