P060B

What it means

P060B means the engine control module has detected a performance fault in its internal analogue-to-digital processing. This is the part of the module that converts sensor voltages into digital values. The module's self-checks found the converted values did not match expected reference readings, so it set the code and may have limited some functions.

Symptoms

• Engine warning light on
• Engine running in limp mode or with reduced power
• Hesitation, poor throttle response or an unstable idle
• Hard starting or, in some cases, no start
• Other unrelated sensor codes stored at the same time
• Intermittent fault that comes and goes

Possible causes

• Low or unstable power supply to the control module, such as a weak battery, poor charging or voltage dropslikely
• Poor module earth connections or corroded power feeds and fuseslikely
• Damaged wiring or loose, corroded or water-affected connectors at the control modulepossible
• Shorted sensor or actuator pulling down the shared sensor reference supply, upsetting the module's readingspossible
• Outdated or faulty control module software calibration where the manufacturer has issued a known updatepossible
• Internal fault in the control module, such as a failed processing circuit or water damagerare

How to diagnose

1. Read all stored codes and freeze frame data, noting battery voltage, engine load and speed when the fault set, and look for other codes that point to a shared supply or reference fault
2. Test the battery state of charge and the charging system output, and check for voltage dips during cranking
3. Inspect the control module connectors, earths, main relay and fuses for corrosion, moisture, heat damage and looseness
4. Carry out voltage drop tests on the module power and earth circuits with the circuit loaded
5. Check the sensor reference supply voltages at the module and unplug suspect sensors one at a time to see whether the reference recovers
6. Check wiring harness for chafing, rodent damage or previous repair faults near the module and along the main loom
7. Check whether the manufacturer has published a software update or technical bulletin for this code on the specific model and engine
8. Clear the code and road test, then recheck to see if it returns before considering module replacement

How to fix

• Repair or replace a weak battery and correct any charging system fault
• Clean, tighten or repair the module earths, power feeds and connectors
• Repair damaged wiring or replace a corroded connector or terminals
• Replace any faulty sensor that is overloading the reference supply
• Install an approved software update if one is available for the vehicle's known fault
• Replace or repair the control module only after supply, earth and wiring faults are ruled out, and have it coded to the vehicle as required

Can I keep driving?

Nearby codes

• P060AGenericInternal Control Module Monitoring Processor Performance
• P060CGenericInternal Control Module Main Processor Performance