P060B: Internal Control Module A/D Processing Performance

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'.

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

Most 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

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the battery and grounds
2. Compare the reading with other engine data while varying the engine speed.
3. Clear the code and see if it returns
4. If it is a reference voltage code, disconnect sensors one at a time and see if the voltage recovers
5. Check whether a software update is available
6. Do not replace the control module without a full diagnosis

Good to know

• Repair difficulty: hard
• It can trigger limp mode.
• It affects emissions.

What each character of P060B means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• 6: Control modules and outputs
• 0B: Specific fault in that system

Frequently asked questions

Can I keep driving with code P060B?

It depends on the symptoms. If the car is running normally you can go to a repair shop; if it goes into limp mode, drive as little as possible.

What causes code P060B?

The most common causes are: 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.

Related codes

• P060AInternal Control Module Monitoring Processor Performance
• P060CInternal Control Module Main Processor Performance
• P0606Control Module Processor
• P060DInternal Control Module Accelerator Pedal Position Performance
• P060EInternal Control Module Throttle Position Performance
• P0641Sensor Reference Voltage A Circuit/Open

Sources

• law.cornell.edu: 13 CCR 1968.2
• fordservicecontent.com: obd summary diesel 2023
• gsi.ext.gm.com: 14OBDG10 Engine Diagnostics
• gsi.ext.gm.com: 25OBDG03A

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.