What P060B means
The analog-to-digital converter turns every analog sensor voltage into a number, so a faulty converter can falsify many values at once.
How the engine computer detects it
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'.
Written from public technical sources and not yet checked by a mechanic. How we write these pages
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
Common causes
- Faulty module software (update available) Most likely
- Unstable supply voltage or poor ground at the module (weak battery, voltage spikes) Possible
- Internal defect of the converter or its chip Possible
- Shorted sensor input pulling the converter reference Less likely
How to diagnose P060B
- Read every stored code with an OBD-II scanner. If misfire or fuel trim codes are there too, fix those first: they often cause this one.
- Inspect the parts involved: engine control module, control module power supply, control module ground.
- Work through the causes above from most to least likely, cheapest checks first.
- Clear the code and drive a full drive cycle to confirm the repair held.
Reading the code
- P
- Powertrain
- 0
- Generic (SAE) code
- 6
- Computer and output circuits
- 0B
- Specific fault
Questions drivers ask
Can I drive with code P060B?
Drive gently and only as far as you need to. The engine computer may limit power to protect the engine, so avoid highways and heavy traffic until it's fixed. If the check engine light starts flashing, pull over.
Will my car pass an emissions inspection with P060B?
Probably not in states that test vehicles with an OBD-II scan: an emissions-related code that keeps the check engine light on is usually an automatic fail. Rules differ by state and county, so check yours.
This page is general information, not a substitute for a professional diagnosis. Repair costs are rough estimates for parts and labor and vary by vehicle and region.