P061B
Internal Control Module Torque Calculation Performance
Engine control module (ECM)
Generic OBD-II
High
What it means
P061B means the ECM's internal torque model — the running calculation of how much torque the engine should be making versus its sensor inputs — has failed a self-consistency check. Because throttle and airflow feed that model, a bad MAF, throttle sensor, wiring, or voltage problem often triggers it. The car usually responds by cutting power or entering limp mode to stay safe.
High
Can I keep driving? Risky — the ECM's internal torque calculation has failed a plausibility check, so the car often drops into limp mode with reduced power. Drive gently and get it diagnosed.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or limp mode
- Hesitation or poor throttle response
- Rough idle in some cases
Common causes
Most likely first
- Faulty throttle actuator / throttle position sensor inputLikely
- Failing or contaminated mass air flow (MAF) sensorCommon
- Damaged wiring or poor connections to the throttle body or MAFCommon
- Low or unstable supply voltage / poor ECM groundsLess often
- Internal ECM fault (checked last)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and scan for related throttle, MAF, or voltage codes — the torque calculation depends on those inputs.
- Inspect and clean the MAF sensor and check the throttle body/actuator connector and wiring.
- Verify ECM power and ground quality; low voltage can corrupt the calculation.
- Test throttle and MAF signals against spec and repair the offending sensor or wiring.
- Reflash or replace and program the ECM only if inputs, wiring, and voltage all check out.
FAQ
Quick answers
Is it safe to drive with P061B?+
Use caution. The car usually enters limp mode with reduced power to protect itself; drive gently and get it diagnosed soon.
Can I just clear P061B?+
It clears, but returns as soon as the ECM again can't reconcile its torque math. Fix the throttle/MAF input or voltage cause first.
Related codes
Often seen with P061B
Read & clear P061B yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX