Fix P060B: Mechanic’s solutions that WORKED

The OBD2 code P060B indicates a problem with the Analog to Digital (A/D) processing performance within the vehicle’s Engine Control Module (ECM) or Powertrain Control Module (PCM). This error points to inconsistencies or failures in the module’s ability to convert analog signals from various sensors into digital data for processing. Such issues can lead to various operational problems, including no-start conditions, poor running quality, or even intermittent vehicle stalling.

P060B quick overview

Meaning	P060B: Internal Control Module A/D Processing Performance
Is it serious?	Yes, it can impact the vehicle’s performance and may lead to more significant issues if not addressed.
Possible causes	– Faulty ECM/PCM – Damaged or poor connections in the ECM/PCM circuitry – Short circuits or issues within the vehicle’s electrical system affecting the ECM/PCM
How to diagnose?	Inspect the ECM/PCM for any signs of physical damage or water intrusion Check the wiring and connectors related to the ECM/PCM for corrosion, damage, or loose connections Perform voltage and ground checks on the ECM/PCM to ensure it’s receiving proper power Consider ECM/PCM replacement or reprogramming if diagnostics indicate module failure or corruption

How to fix P060B – learn from mechanics

I looked into P060B service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.

Case #1: Dodge

Vehicle Information 2014 Dodge Ram 2500 Tradesman 6.7L

Issue + Repair History

• The vehicle was initially diagnosed with a no-start condition attributed to a fuel pump issue; the OEM fuel pump was replaced, and vehicle ran fine.
• After two weeks, the truck returned with symptoms of running poorly, spitting, and sputtering.
• Diagnostic trouble codes (DTCs) retrieved: P060b, P2104, and P2110 indicating throttle body issues.
• Throttle body unit replaced with a new one, temporarily resolving the issue.
• Problem recurred a few days later despite throttle body replacement.
• ECU connections and throttle body unit (TBU) connections checked, along with inspection of engine harness due to previous roll locks and harness damage during engine installation.

Other OBD2 Codes + Test Results

• P060b: Internal control module random access memory (RAM) error
• P2104: Throttle actuator control system forced idle
• P2110: Throttle actuator control system forced limited RPM

Mechanic Suggestions

• Investigate the integrity of throttle body wire insulation, as it may be fragile and prone to touching.
• Consider the possibility of internal issues in the powertrain control module (PCM) or a voltage reference (VREF) short, particularly with the presence of P060b.
• Perform voltage drop tests on ground circuits before considering PCM replacement.
• Verify the condition of engine wires for short or open circuits, especially in cases of engine swaps.
• Check ground resistance using IDS (Integrated Diagnostic System) and inspect PCM power relay and A/C clutch diode for potential backfeeding issues.
• Before replacing the PCM, ensure correct pin positions in the connector and test power and ground connections thoroughly.

Final Fix

• Throttle body was replaced again, and codes were cleared along with the keep-alive memory. The problem did not reoccur after this replacement, and the vehicle no longer experienced throttle response issues.

Case #2: Volvo

Vehicle Information 2015 Volvo XC60 T5 2.0L

Issue + Repair History

• MIL (Malfunction Indicator Lamp) illuminated.
• Diagnostic trouble codes (DTCs) retrieved: P0598, P060b, P240b00, B10e811, and B139f11.
• Customer recently replaced the main battery and start-stop battery with OE Volvo units.
• Initial troubleshooting included a software update, replacement of start-stop relay and fuse panel, and checking for potential short circuits.
• New thermostat heater installed due to suspected damage to the ECM (Engine Control Module).
• Despite the thermostat heater replacement, all faults persisted.
• ECM replacement was recommended and approved by the customer.
• All faults cleared after ECM replacement and software reload.

Other OBD2 Codes + Test Results

• P060b00: Internal control module A/D processing
• P059800: Thermostat heater control circuit low
• P240b00: Evap emission system leak detection pump heater circuit low
• B10e811: Secondary Battery relay “A” – general electrical failure, short to ground
• B139f11: Main battery relay – general electrical failure, short to ground

Mechanic Suggestions

• Disconnect thermostat heater to isolate potential ECM damage caused by shorted heater.
• Check power supply to the thermostat heater, as it may be missing.
• Consider replacing the thermostat if the coolant temp sensor shorts out, potentially damaging the ECM.
• If the MIL persists after thermostat replacement, ECM repair or replacement may be necessary, with the possibility of repair services offered by xemodex.com.
• Check the condition of the leak detection pump (LDP) and consider replacing it if needed.
• Verify the voltage of the small battery; if it’s below 10.6 volts, replacement is recommended to prevent start-stop system issues.

Final Fix

• ECM replacement and software reload resolved all fault codes, indicating successful repair.

Case #3: Lexus

Vehicle Information 2006 Lexus RX400h 3.3L

Issue + Repair History

• Vehicle experienced a no-start condition with the “CHECK HYBRID SYSTEM” message.
• Upon scanning, multiple codes related to the hybrid system were retrieved: P0340, P0343, P0516, P0517, P060b (134), and P060b (135).
• No check engine light was illuminated.
• All hybrid system codes persisted even after clearing.
• Codes were cleared, and the vehicle started immediately, but the issue recurred after a short period.
• Despite successful starts after code clearing, the codes reappeared consistently.
• Vehicle was taken to the dealer, where no codes were found, and the vehicle functioned normally afterward.

Other OBD2 Codes + Test Results

• P0340: Camshaft Position Sensor A Circuit
• P0343: Camshaft Position Sensor A Circuit High Input
• P0516: Battery Temperature Sensor Circuit Low
• P0517: Battery Temperature Sensor Circuit High
• P060b (134): Internal Control Module A/D Processing Performance
• P060b (135): Internal Control Module A/D Processing Performance

Mechanic Suggestions

• Suspected ECM (Engine Control Module) issues based on P060b codes, indicating a potential need for ECM replacement.
• Recommendations to check for ECM powers, grounds, and the 5-volt reference circuit for any shorts.
• Suggestions to check the auxiliary battery, ensuring it’s the correct one, and verifying its power and ground connections to the ECM.
• Advice to investigate recent repairs on the vehicle, considering the possibility of dropped objects causing shorts or RF interference.
• Emphasis on checking the 12-volt battery, as illogical data can occur when it begins to fail, particularly in hybrid vehicles where starter load during cranking may not exhibit typical signs of battery issues.

Final Fix

• The issue was not conclusively resolved, as no codes were found upon inspection at the dealer, and the vehicle functioned normally afterward. Further monitoring may be necessary to detect any recurrence of the issue.

Diagnostic Step	Explanation
Inspect the ECM/PCM	Look for physical damage or signs of water intrusion.
Check wiring and connectors	Examine for corrosion, damage, or loose connections.
Perform voltage and ground checks	Ensure the ECM/PCM is receiving proper power and ground.
ECM/PCM replacement or reprogramming	If issues are found with the module, consider replacing or reprogramming it.

Addressing a P060B code involves a comprehensive evaluation of the ECM/PCM and its connections to ensure accurate data processing and vehicle operation. Given the complexity of modern vehicle electronic systems, professional diagnostics and repairs are often required to accurately identify and correct the underlying problem, ensuring the vehicle operates smoothly and reliably.

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