Transmission Range Display Circuit
What does P0814 mean?
The P0814 code means the vehicle's onboard diagnostic system has detected: Transmission Range Display Circuit. This is a low severity code.
Common Symptoms
- Gear position indicator on dashboard shows incorrect gear
- Check Engine Light illuminated
- PRNDL display is blank or flickering
- Gear indicator may show wrong gear selection
Probable Causes (Ranked by Likelihood)
- Faulty transmission range display module or instrument cluster issue Very High
- Wiring fault between TCM and instrument cluster High
- Communication error on vehicle data bus Moderate
- Faulty transmission range sensor providing incorrect data Low
Step-by-Step Diagnostic Procedure
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Check if the gear indicator matches actual gear selection using a scan tool
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Inspect wiring between the TCM and instrument cluster
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Check for communication DTCs on the CAN bus network
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Test the transmission range sensor signal accuracy
Frequently Asked Questions
Is P0814 dangerous?
P0814 is a low-severity code. The transmission still shifts normally, but the display may show the wrong gear. This is mostly an inconvenience rather than a safety concern.
Can a failing instrument cluster cause P0814?
Yes, a malfunctioning instrument cluster can fail to display the correct gear position even when the transmission and TCM are functioning properly.
Does P0814 affect how the transmission shifts?
No, P0814 is a display issue only. The transmission will continue to shift based on the actual range sensor and TCM inputs, not the dashboard display.