Possible causes

– Faulty Upshift Switch
– Upshift Switch harness is open or shorted
– Upshift Switch circuit poor electrical connection

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0815 Information for specific makes

P0815 DODGE
P0815 ACURA
P0815 HONDA
P0815 FORD
P0815 MITSUBISHI
P0815 CHRYSLER
P0815 JEEP