Powertrain, generic · Computer and auxiliary outputs

P060B Internal Control Module A/D Processing Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

The analog-to-digital converter turns every analog sensor voltage into a number, so a faulty converter can falsify many values at once. The module checks it by timing its start-up calibration (GM 6.6 L diesel: 0.30 s or longer is a fault), by converting fixed internal reference voltages (about 4.73–4.83 V must be read), by grounding a test channel that must then read near 0 V (Ford diesel: over 249 mV is a fault) and by comparing with a second converter. GM sets it in the first trip, Ford with the check engine and wrench lamps as a level 3 check; the module usually enters limp mode. Ford fixed an F-150 2.7 L case (with misfire codes) by reprogramming. GM also uses P060B in the brake module – then ABS warnings appear and the engine module is not the culprit. The old wording 'A and D' simply spelled out 'A/D'.

Likely causes

Faulty module software (update available)
Unstable supply voltage or poor ground at the module (weak battery, voltage spikes)
Internal defect of the converter or its chip
Shorted sensor input pulling the converter reference

Symptoms

  • Check engine light, at Ford also the wrench lamp
  • Reduced power or limp mode
  • Several sensor or misfire codes at the same time
  • ABS/ESC warning if the brake module set the code

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,500
Time0.5–3 h

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

Parts involved

engine control modulecontrol module power supplycontrol module ground

Related codes

P060AP060CP0606P060DP060EP0641

References: law.cornell.edu, fordservicecontent.com, gsi.ext.gm.com, gsi.ext.gm.com.