2002 Mazda protege
The "HOLD" light on my dash started blinking and it won't climb up hills. I pull codes 11, 13, 16, 18 and 27 By bridging the obd port with a led...
Need help
When are those error codes

 

Get someone to scan it with a proper OBD II tool but you may be having trouble with the wiring going up to the overdrive button on the left side of the shifter. Try pushing it on/off a time or two and see what happens first. You might have bumped it into the off position.

 

I have a mazda familiar and it was showing this hold message. Had to change the gear box oil but light kept on flicking. A gearbox mechanic opened the gearbox, the backplate cover was wasted and some clutches on the inside too