P0815

Symptoms

• Inability to shift to higher gears
• Check Engine Light Is On
• The car goes into emergency mode
• Reduced acceleration dynamics
• Increased fuel consumption

Causes

• Open or short circuit in switch circuit
• Malfunction of the overdrive switch itself
• Problems with wiring harness or contacts
• Transmission ECU malfunction
• Corrosion or oxidation of contacts

How to Fix

1. Check the continuity of the switch circuit
2. Check the operation of the overdrive switch
3. Inspect and, if necessary, replace the wiring harness
4. Check contacts for corrosion and clean them
5. Replace switch if necessary

Related codes

Error P0815 by Vehicle Brand