P2750: Intermediate Shaft Speed Sensor C Circuit Range/Performance
The P2750 code indicates that the Powertrain Control Module (PCM) has detected a signal from the intermediate shaft speed sensor 'C' that is outside the expected range or performance parameters. This sensor monitors the rotational speed of the intermediate shaft within the transmission, which is critical for proper shift timing and transmission operation. A range/performance issue suggests the signal is erratic, weak, or inconsistent, often due to sensor malfunction, wiring problems, or mechanical issues within the transmission.
1. Most Common Causes
- Faulty or worn intermediate shaft speed sensor 'C'
- Damaged, corroded, or loose sensor wiring
- Sensor connector contaminated with moisture, oil, or dirt
- Mechanical issues with the intermediate shaft or reluctor ring (wear, damaged teeth)
- Transmission control module (TCM) failure (software or hardware)
- Incorrect transmission fluid level or condition
- Electromagnetic interference in the sensor circuit
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or erratic shifting
- Transmission slipping or delayed engagement
- Reduced fuel economy
- Transmission may enter limp mode
3. Step-by-Step Diagnosis
Step 1: Scan the vehicle for codes and record freeze frame data to confirm P2750 and check for related codes.
Step 2: Visually inspect the intermediate shaft speed sensor C and its wiring harness for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and voltage output using a multimeter and compare to manufacturer specifications.
Step 4: Check for metal debris on the sensor tip or in the transmission fluid, which may indicate internal wear.
Step 5: If sensor and wiring are okay, perform a transmission fluid pressure test or internal inspection to rule out mechanical issues.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with P2750 as it can cause erratic shifting and potential transmission damage. Limp mode may limit speed and drivability.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for sensor replacement and basic diagnostics, but can be higher if internal transmission repairs are needed.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.