Powertrain
Definition only
Lights the check engine lamp
P2784: Input/Turbine Speed Sensor A/B Correlation
Standardized SAE J2012 code · P27xx — Transmission
What does P2784 mean?
The two input or turbine shaft speed sensors A and B do not agree within tolerance. Either sensor may be drifting or missing pulses.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Damaged tone wheel teeth
- Medium One sensor drifts in air gap or amplitude
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2784 on the same make and model first.
P2784 in the community
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