OBD-II code P2750 indicates that the powertrain control module (PCM) has detected a range or performance problem with the signal from the 'C' intermediate shaft speed sensor. This sensor monitors the rotational speed of the transmission's intermediate shaft, and the code sets when the signal is erratic, out of expected range, or does not match other speed sensor inputs under certain conditions.
The sensor itself may have internal electrical failure, contamination, or physical damage, causing an incorrect or intermittent signal.
Chafed, broken, or shorted wiring in the sensor circuit, or a loose, corroded connector can disrupt the signal and trigger the code.
Insufficient fluid level or degraded fluid can affect hydraulic pressure and sensor readings, leading to range/performance errors.
Internal problems such as slipping clutches, worn bands, or a failing torque converter can cause actual shaft speed to deviate from expected values.
A rare cause; the control module may misinterpret sensor signals due to internal faults, but this should only be considered after all other possibilities are ruled out.
It is not recommended. The transmission may shift poorly or enter limp mode, which can cause further damage and leave you stranded.
A failed intermediate shaft speed sensor or damaged wiring/connector is the most frequent cause. Always start diagnosis there.
Not necessarily. While internal mechanical problems can trigger this code, it is often resolved by replacing a faulty sensor or repairing wiring.
Almost never. Control module failure is extremely rare for this code. Replacing the PCM or TCM without thorough diagnosis of the sensor, wiring, and transmission fluid is a common misdiagnosis and should be a last resort.