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P2752 — Intermediate Shaft Speed Sensor C Circuit Intermittent

Manufacturer-specificPowertrain (engine & transmission)

The P2752 code indicates that the powertrain control module (PCM) has detected an intermittent signal from the Intermediate Shaft Speed Sensor C. This sensor monitors the rotational speed of the transmission's intermediate shaft to ensure proper gear synchronization and shift timing.

Symptoms

What causes it — most likely first

1. Failed Speed Sensor

Internal electrical failure or an intermittent open circuit within the Intermediate Shaft Speed Sensor C.

2. Wiring Harness Damage

Frayed, chafed, or corroded wiring between the sensor and the PCM causing signal dropout.

3. Connector Corrosion

Moisture or contaminants in the sensor connector leading to poor electrical contact.

4. Contaminated Sensor Tip

Metal shavings or debris accumulated on the sensor head, disrupting the magnetic signal.

5. Damaged Tone Ring

A chipped, worn, or loose gear/tone ring that the sensor monitors, causing irregular readings.

6. PCM Fault

Internal failure of the powertrain control module's processing circuit for this specific input.

How it's diagnosed

  1. Perform a scan to retrieve freeze frame data to determine operating conditions when the fault occurred.
  2. Visually inspect the sensor connector and wiring harness for signs of wear, corrosion, or burning.
  3. Test the sensor's electrical continuity and check for short-to-ground or open circuits using a digital multimeter.
  4. Use an oscilloscope to monitor the sensor's signal waveform for dropouts or irregular pulses while the engine is running.
  5. Remove the sensor and inspect the tone ring for physical damage or excessive debris.
  6. Clear the code and perform a road test to see if the intermittency is linked to specific temperatures or vibrations.

Code facts & related codes

SystemPowertrain (engine & transmission)
StandardizationManufacturer-specific (P1/B1/C1/U1)
Related codesP2750 — Intermediate Shaft Speed Sensor C CircP2751 — Intermediate Shaft Speed Sensor C CircP2753 — Transmission Fluid Cooler Control CircP2754 — Transmission Fluid Cooler Control CircP2755 — Transmission Fluid Cooler Control CircP2756 — Torque Converter Clutch Pressure Contr

Frequently asked

Can a faulty speed sensor cause the transmission to stop shifting?

Yes, if the PCM receives unreliable data from the intermediate shaft sensor, it may enter a protective limp-home mode, restricting the transmission to a single gear.

Should I replace the PCM if this code persists?

No, it is highly uncommon for the PCM to be the cause of P2752. The issue is almost always located in the sensor, the wiring, or the mechanical tone ring.

Is this code caused by low transmission fluid?

Generally no; while low fluid can cause shifting issues, P2752 is specifically an electrical circuit intermittency code related to the speed sensor signal.