P0814 Transmission Range Display Circuit

P0814 points to a transmission range display circuit fault. The selected gear or PRNDL display signal is not matching the controller's expected state.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System: Transmission
Scope: iso-sae-controlled-p0
Standard: SAE J2012 / ISO 15031-6
Source: legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace the range display or cluster before checking whether the controller is sending valid range data.

Useful checks before replacing parts

Compare scan-tool range data, instrument cluster display, shifter position, and module communication data in every selector position.
Inspect cluster communication, range display wiring, shifter module connectors, grounds, and water intrusion near console electronics.
Check for companion range sensor, communication, or body module codes that can explain a wrong or missing gear display.

Related OBD-II codes

These nearby transmission entries can help compare wording and fault area. They may share the same verification status as the source database.