What Does P060B Mean?
P060B indicates that the ECM/PCM has detected a performance issue with its internal Analog-to-Digital (A/D) converter processing. The A/D converter is the circuit that translates analog sensor signals (voltage values from throttle position, MAP, coolant temp, etc.) into digital values the processor can use. When this conversion process fails, the ECM cannot accurately read sensor inputs. The driver may notice erratic engine behavior, incorrect gauge readings, or limp mode.
Safety Warning
Do not drive. A failed A/D converter means the ECM cannot accurately read sensor inputs, which can lead to incorrect fuel delivery, ignition timing, and throttle control. The engine could run dangerously lean or rich, or the electronic throttle could behave unpredictably. Tow to a repair facility.
Common Causes
40%
Internal ECM/PCM A/D converter hardware failure
20%
ECM voltage reference circuit issue affecting A/D conversion accuracy
18%
Power supply noise or ripple corrupting A/D conversion results
12%
Sensor signal interference causing A/D conversion errors
10%
ECM software calibration error in A/D conversion thresholds
Diagnostic Steps
1
Check the ECM's 5-volt reference outputs — measure at multiple sensor connectors (TPS, MAP, coolant temp). All should read between 4.9V and 5.1V. A reference outside this range indicates an ECM or sensor circuit issue.
2
Monitor multiple analog sensor PIDs simultaneously on the scan tool — look for values that are frozen, erratic, or out of expected ranges, which would confirm A/D conversion problems.
3
Check ECM power supply for noise using an oscilloscope — the power supply should be clean DC with ripple below 200mV. Excessive noise from the alternator or aftermarket electronics can corrupt A/D readings.
4
Disconnect sensors one at a time and observe if the code clears — a shorted sensor can pull the A/D converter out of range and affect other channels on the same converter.
5
If all sensor circuits and power supply test good, attempt an ECM reflash. If the code returns, the internal A/D converter has failed and the ECM must be replaced.
Estimated Repair Cost
$350 - $1,800
Parts + labor, varies by vehicle and location
P060B indicates that the ECM/PCM has detected a performance issue with its internal Analog-to-Digital (A/D) converter processing. The A/D converter is the circuit that translates analog sensor signals (voltage values from throttle position, MAP, coolant temp, etc.) into digital values the processor ...
The most common cause of P060B (Internal Control Module A/D Processing Performance) is: Internal ECM/PCM A/D converter hardware failure
Typical repair costs for P060B range from $350 to $1,800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Do not drive. A failed A/D converter means the ECM cannot accurately read sensor inputs, which can lead to incorrect fuel delivery, ignition timing, and throttle control. The engine could run dangerously lean or rich, or the electronic throttle could behave unpredictably. Tow to a repair facility.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P060B to identify the root cause.
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Quick Info
Category
Powertrain
System
Engine Control Module
Difficulty
Type
Generic (SAE)
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