P0814 low

Transmission Range Display Circuit

The P0814 code means the vehicle's onboard diagnostic system has detected: Transmission Range Display Circuit. This is a low severity code.

My Garage →

Keep driving?: Yes, but fix soon
DIY difficulty: moderate
Estimated cost: $100 - $500 (parts and labor)

Check Your Fluid First

ANCEL AD310 OBD-II Scanner

Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.

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Read Transmission Codes

LAUNCH CRP123X (Reads All Systems)

Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.

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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

Check if the gear indicator matches actual gear selection using a scan tool
Inspect wiring between the TCM and instrument cluster
Check for communication DTCs on the CAN bus network
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.