Transmission Range Sensor Correlation Failure
The P2805 code indicates that the Transmission Range Sensor (TRS) is sending a signal that does not match the actual gear position detected by other sensors, such as the input/output speed sensors. This correlation error typically occurs in automatic transmissions and can be caused by a faulty TRS, misadjusted shift linkage, wiring issues, or internal transmission problems. The sensor tells the PCM which gear is selected, and when the signal is inconsistent, the PCM may default to a safe mode, limiting transmission operation.
01. Most Common Causes
- Faulty transmission range sensor
- Misadjusted or damaged shift linkage
- Wiring or connector issues in the sensor circuit
- Internal transmission mechanical failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission stuck in limp mode or fails to shift properly
- Incorrect gear indication on the dashboard
- Engine starts in any gear or fails to start
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and check freeze frame data.
Step 2: Inspect the transmission range sensor connector and wiring for damage or corrosion.
Step 3: Test the sensor's resistance and voltage output per manufacturer specifications.
Step 4: Check shift linkage adjustment and ensure proper cable operation.
Step 5: If all else fails, replace the transmission range sensor and clear codes.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as the transmission may enter limp mode, causing poor performance and potential damage. Have it diagnosed promptly.
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.