P2751: Intermediate Shaft Speed Sensor C Circuit No Signal
The P2751 code indicates that the transmission control module (TCM) has detected no signal from the intermediate shaft speed sensor C. This sensor monitors the rotational speed of the intermediate shaft inside the transmission, which is critical for proper shift timing and torque converter lockup. A loss of signal can lead to erratic shifting, harsh engagement, or transmission slippage. Common causes include a faulty sensor, damaged wiring, or a poor electrical connection.
01. Most Common Causes
- Faulty intermediate shaft speed sensor C
- Damaged or shorted wiring or connector
- Low transmission fluid level or contamination
- Internal transmission mechanical failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Erratic or harsh shifting
- Transmission stuck in limp mode
- Delayed engagement or slipping
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and verify P2751 is present.
Step 2: Inspect the sensor and wiring for damage, corrosion, or loose connections.
Step 3: Test sensor resistance and voltage with a multimeter per manufacturer specs.
Step 4: Check transmission fluid level and condition; top off or replace if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the transmission may shift erratically or fail, potentially causing further damage.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, but can be higher if internal transmission repairs are needed.