What does p1870 stand for in car code?
What does p1870 stand for in car code? This understandably leads to some confusion about the actual definition of code P1870 as it applies to different manufacturers. Nonetheless, the “Transmission Component Slipping” part of the definition means the same thing for all manufacturers that apply this code to transmission slippage problems. What is the diagnostic code for transmission slippage? Diagnostic trouble code P1870 (Transmission Component Slippage) is a General Motors-specific code whose set parameters are determined by transmission type and engine size. The PCM monitors and compares engine speed to vehicle speed after the converter clutch has been commanded ON...