Chassis, generic

C0805 Steering Angle Sensor Calibration

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Public evidence for C0805 is lacking: it appears neither in code lists nor in the NHTSA index, GM's keyword table or the Saab and Mitsubishi indexes. The title describes a steering angle sensor whose zero point has not been learned. GM files exactly that fault elsewhere: in both 2011 Saab models, 9-5 and 9-4X, the brake module stores C0710 subcode 42 when the sensor reports no calibration, then switches off ESC and the hill holder until the next ignition cycle. Stellantis uses the J2012 code C0529 for the same condition on the ProMaster and advises an initialisation first, by turning lock to lock with the engine running or by scan tool, before any steering gear is replaced. The bulletin names a battery disconnect or a new steering gear as typical triggers for a fresh learn.

Likely causes

Zero point not learned after battery disconnect or steering gear replacement
Steering wheel or sensor mounted off centre, so the learned offset is out of range
Steering angle sensor defective and unable to store the calibration

Symptoms

  • Stability or traction control lamp stays on
  • ESC and hill start assist unavailable

Repair estimate

DifficultyEasyWorkshop job
Parts and labour€30–150
Time0.2–1 h

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

Parts involved

steering angle sensoresp control module

Related codes

C0529C0710C0830C0526

References: saabwisonline.com, saabwisonline.com, static.nhtsa.gov.