Fix P061A: Mechanic’s solutions that WORKED

The code P061A: Internal Control Module Torque Performance points out a problem with the internal control module’s torque performance, and it is most likely caused by mechanical engine issues, a faulty PCM, sensor malfunctions, or vacuum leaks.

P061A quick overview

Description	P061A: Internal Control Module Torque Performance
Is it serious?	This code can be serious as it may indicate a fundamental issue within the engine’s control system, potentially affecting vehicle performance and drivability.
Possible causes	– Mechanical engine issues – Faulty Powertrain Control Module (PCM) – Issues with engine sensors like MAP or fuel pressure sensors – Vacuum leaks
How to diagnose?	Perform Mechanical Checks: Conduct engine compression and leak-down tests. Inspect Engine Sensors: Check the function of critical sensors like MAP and fuel pressure sensors. Look for Vacuum Leaks: Use smoke tests to detect any vacuum leaks in the intake system. Evaluate PCM: Consider reprogramming or replacing the PCM if other causes are ruled out.

How to fix P061A – learn from mechanics

I looked into P061A 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: 2004 Dodge Ram 2500 ST 5.7L

Issue + Repair History:

• Throttle actuator disables after a cruise, leading to P061A, P2106, and P2175 codes.
• Previously had a clogged K&N air filter, which was replaced with a Wix filter.
• Throttle body cleaned, no vacuum leaks found.

Suggestions to Fix Issue:

• Replace and reprogram the PCM (Powertrain Control Module).

Final Fix:

• Replaced the PCM and performed a reflash with the current programming, which resolved all issues.

Case #2: Mercedes

Vehicle Information: 2013 Mercedes-Benz C250 1.8L

Issue + Repair History:

• Persistent, intermittent misfire on cylinder #4.
• Replaced coils and spark plugs, added fuel treatment, but issue remained.

Other OBD2 Codes + Test Results:

• P0304: Combustion misfiring of cylinder # 4
• P0313: Combustion misfire with active fuel reserve signal
• P061a (98): Torque control malfunction in control unit

Suggestions to Fix Issue:

• Swap injectors between cylinders to identify if the injector is faulty.
• Use a scope to analyze injector and coil functionality.
• Check engine compression when cold and warm.

Final Fix:

• Performed a Liqui Moly engine flush which resolved the misfire issue, with no recurrence of codes or Check Engine light after extensive testing.

Case #3: Volvo

Vehicle Information: 2009 Volvo XC70 T6 3.0L

Issue + Repair History:

• Fault codes P0190 and P061A.
• Vehicle stalls at idle intermittently.
• Fuel pressure drops observed during stalling.
• Replaced fuel pressure sensor, but issue persisted.

Other OBD2 Codes + Test Results:

• P0190-00: Fuel Rail Pressure (FRP) Sensor General Fault.
• P061A-62: Internal Control Module Torque Performance.

Suggestions to Fix Issue:

• Replace the fuel pressure sensor.
• Monitor fuel pump duty cycle and fuel pressure.
• Consider replacing the fuel pump.
• Check for intake air leaks.

Final Fix:

• After additional testing, replaced the fuel pressure sensor.
• Disconnected and reconnected the battery.
• No further stalling or hesitation after extensive idling and test driving.

Case #4: Dodge

Vehicle Information: 2005 Dodge Magnum SE 2.7L

Issue + Repair History:

• Returned with codes P0430 (Catalyst Efficiency Bank 2) and P061A (Internal Control Module Torque Performance).
• Previously replaced long block 3000 miles ago.
• Symptoms include stalling at stops and surging.

Suggestions to Fix Issue:

• Address the P0430 code and check for any additional codes.
• Inspect for vacuum or air leaks, particularly around the throttle body, intake, and EGR tube.

Final Fix:

• Found a vacuum leak using a smoke machine.
• The issue was traced to a faulty o-ring on the EGR tube.
• Replacing the o-ring resolved the issues, including the P061A code.

Case #5: Ram

Vehicle Information: 2014 Ram 2500 SLT 6.4L

Issue + Repair History:

• Service ETC and Traction Control lights on.
• Poor idle, stalling, and limp mode after driving a mile.
• DTC P061A: Level 2 Torque Performance.
• Fuel trims at -33%, O2 sensors reading rich.
• Replaced PCM, but issue persisted.

Other Test Results:

• Idle vacuum fluctuating rapidly.
• Fuel pressure at 55 psi.

Suggestions to Fix Issue:

• Check for vacuum leaks.
• Perform mechanical engine tests (compression test, leak down test).
• Check for valve timing issues or internal intake vacuum leak.

Final Fix:

• Found faulty MAP sensor with constant output voltage.
• Replaced MAP sensor, resolving the issue.

Advice	Diagnostic Step Description
Check for Mechanical Issues	Perform engine mechanical tests such as compression tests and leak down tests to rule out mechanical failures.
Inspect Engine Vacuum	Check engine vacuum readings for fluctuations or unusually low readings that may indicate mechanical or intake problems.
Consider PCM Reprogramming or Replacement	If mechanical issues are ruled out, consider reprogramming or replacing the PCM, as the code may indicate PCM performance issues.
Evaluate Fuel Pressure and Sensors	Monitor fuel pressure and check the operation of related sensors like MAP or fuel pressure sensors.
Look for Vacuum or Air Leaks	Investigate for any vacuum leaks in the intake manifold or associated plumbing.