Gear Shift Position Circuit Malfunction
The P0914 code indicates a problem in the gear shift position circuit, which is responsible for detecting the position of the gear selector (e.g., Park, Reverse, Neutral, Drive). This circuit typically uses sensors or switches to send the selected gear position to the transmission control module (TCM) or powertrain control module (PCM). A fault can cause incorrect gear selection, transmission shifting issues, or prevent the engine from starting. Common causes include a faulty gear shift position sensor, damaged wiring, or a malfunctioning TCM/PCM.
01. Most Common Causes
- Faulty gear shift position sensor
- Damaged or corroded wiring/connectors in the circuit
- Malfunctioning transmission control module (TCM) or powertrain control module (PCM)
02. Symptoms You Will Notice
- Engine may not start or only starts in certain gear positions
- Transmission shifts erratically or fails to shift
- Check Engine Light illuminated
- Gear indicator on dashboard shows incorrect position or is blank
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the gear shift position sensor and wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance or voltage according to manufacturer specifications using a multimeter.
Step 4: If sensor and wiring are okay, check the TCM/PCM for faults or perform a relearn procedure.
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 it can cause unpredictable transmission behavior or prevent the vehicle from starting, leading to a safety hazard.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but can be higher if the TCM/PCM needs replacement.