P061B on RAM: How to Diagnose & Fix
Internal Control Module Torque Calculation Performance
1 RAM model · 1 documented issue
On RAM vehicles, P061B (internal control module torque calculation performance) is most often reported on the 2019 RAM 2500 as MIL and Torque Fault from Outdated 6.7L Cummins PCM Calibration ($0-$300 repair). Start by pulling all stored and pending codes rather than only the one that triggered the lamp; the presence of P0299-00, P0461-00 or P0506 alongside P061B-00 is the signature that points at bulletin 18-066-23. Confirm the truck is a 2019 Ram 2500 or 3500 pickup with the 6. Each section below gives the symptoms, how to confirm the cause, the fix, parts and sources for that model.
Common causes of P061B (all vehicles)
- Failing mass air flow (MAF) sensor or intake air leak feeding the module bad airflow data
- Accelerator pedal position (APP) or throttle position sensor fault, including dirty throttle body
- Wiring, connector, or ground faults on the sensor circuits the torque model relies on
- Restricted exhaust, failing turbocharger, or mechanical engine problem making real torque differ from expected
- Transmission or hybrid/traction control module reporting a conflicting torque request
- Low battery/charging system voltage causing module calculation faults
- Internal PCM/ECM failure or corrupted software calibration (needs reflash or replacement)
P061B on RAM by model: symptoms, diagnosis and fix
2019 Ram 2500 and 3500 pickups with the 6.7L I6 Cummins — both the standard Turbo Diesel and the High Output Turbo Diesel — set P061B-00 as part of a documented cluster of calibration-related faults. Stellantis addressed the pattern in service bulletin 18-066-23 (Group 18, Vehicle Performance; NHTSA document 10239975). The customer complaint is simply an illuminated malfunction indicator lamp; on scan, the technician finds one or more of P061B-00 Internal Control Module Torque Calculation Performance, P0299-00 Turbocharger Underboost, P0461-00 Fuel Level Sensor 1 Performance and P0506 Idle Control System RPM Lower Than Expected. The grouping is the diagnostic clue: on a diesel the PCM builds its torque estimate from commanded rail pressure, injection quantity and boost, so a calibration that models variable-geometry turbo boost response too optimistically will produce both an underboost complaint and a torque-plausibility complaint from the same event. Drivers typically notice little more than the lamp, though some report a soft spot in throttle response or a brief reduction in power under heavy load or while towing. What makes this case worth recognizing is what it rules out: on a truck still on pre-update software, P061B here is very often a calibration artifact rather than evidence of a failing turbo actuator, a leaking charge-air cooler or a dying PCM — all of which are expensive parts that get replaced on these trucks for exactly this code.
Common Symptoms
- Malfunction indicator lamp on with no obvious driveability change
- Soft or delayed throttle response under load
- Brief power reduction while towing or on a grade
- Companion codes for turbocharger underboost or low idle rpm
How to Fix
Start by pulling all stored and pending codes rather than only the one that triggered the lamp; the presence of P0299-00, P0461-00 or P0506 alongside P061B-00 is the signature that points at bulletin 18-066-23. Confirm the truck is a 2019 Ram 2500 or 3500 pickup with the 6.7L Cummins Turbo Diesel or HO Turbo Diesel and check the current PCM part number and calibration level against the latest available file. The bulletin's remedy is a PCM flash performed with wiTECH on the current release; clear all DTCs that the reprogramming itself sets across the module network afterward. Keep a battery maintainer on the truck during the flash, because an interrupted diesel PCM reprogram can leave the module unusable. Expect a dealer to charge roughly $150-$300 if the truck is outside the 5-year/100,000-mile diesel powertrain coverage, and nothing if it is inside. After the update, road-test under load — ideally with a trailer or on a grade — since the boost-related trigger will not reproduce at light throttle. If P061B returns on current software, the code is telling the truth and the diagnosis moves to hardware: inspect the entire charge-air path for boots and clamps that leak under high boost, check the variable-geometry turbocharger actuator for sticking or carbon binding, verify boost pressure sensor readings against a known-good reference, examine fuel rail pressure control and injector return volumes, and inspect PCM connectors and grounds for corrosion or spread terminals. Any aftermarket tuner or deleted emissions hardware must be removed before this code can be diagnosed honestly, since both make the torque model meaningless.
Looking for P061B on a different make?
View P061B across all makes →Frequently asked questions
What does P061B mean on a RAM?
P061B stands for "Internal Control Module Torque Calculation Performance." A generic OBD-II powertrain code. The powertrain control module continuously cross-checks its own calculated engine torque against the torque it commanded, and sets P061B when the two disagree by more than the allowed margin (on many applications roughly 50 Nm for longer than a second, typically at higher engine speeds) or when its internal self-test math does not return the expected result. Engine torque is used by the transmission, traction, and stability control systems, so most vehicles respond by cutting power and entering a reduced-power or limp mode. Expect a lit check engine light, poor acceleration, and possibly a throttle warning message. On RAM it is documented across 1 model: 2500.
How do I diagnose P061B on a RAM 2500?
Start by pulling all stored and pending codes rather than only the one that triggered the lamp; the presence of P0299-00, P0461-00 or P0506 alongside P061B-00 is the signature that points at bulletin 18-066-23. Confirm the truck is a 2019 Ram 2500 or 3500 pickup with the 6. 7L Cummins Turbo Diesel or HO Turbo Diesel and check the current PCM part number and calibration level against the latest available file. Published repair guidance and available estimates are in the 2500 section on this page.
What causes P061B on RAM vehicles?
Documented causes on RAM: MIL and Torque Fault from Outdated 6.7L Cummins PCM Calibration. Generic causes of P061B: Failing mass air flow (MAF) sensor or intake air leak feeding the module bad airflow data, Accelerator pedal position (APP) or throttle position sensor fault, including dirty throttle body, Wiring, connector, or ground faults on the sensor circuits the torque model relies on, Restricted exhaust, failing turbocharger, or mechanical engine problem making real torque differ from expected.
How much does it cost to fix P061B on a RAM?
Repair costs vary widely with the root cause and RAM model; each issue on this page carries its own estimate where one is published.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.