Limp mode oil metering pump

if the sump oil level was low to start with , the hard braking may have caused the oil pump to pump air momentarily and the oil pressure sensor would report and the ECM would place it in limp mode
limp modes are energized by both the engine and the transmission and the transmission TCM unit may have had difficulty in shifting ratios and sio reported it as a fault
run the fault codes and fix what is found or reset the ECM using a scan tool

If these codes are being only set during start I would expect a failure of the battery. If the voltage goes much below 9 VDC the computers (EMS) can become erratic and codes and limp home modes are a common result of defective and discharged batteries!



Careful having the battery tested. Any arcing etc at the battery can be the kiss of death for the engine computer. Better to remove terminal to check. Or test the crank voltage with multi-meter.

probably not if it is limp mode
the ECM puts the car in limp mode to prevent serious problems in the engine or transmission
could be no coolant, sump oil , transmission oil etc
run the fault codes and find the reason for the mode

clear the fault codes with a OBDII meter

check the oil level in the sump, coolant level, coolant temperature (overheating), transmission oil level if auto. The limp mode is energised by any number of sensors that register a fault that is detrimental to the engine/ gear box. Run the fault codes and repair any faulty units . Reset the CPU with a scanner .

P0251 Injection Pump Fuel Metering Control "A" (Cam/Rotor/Injector)
P0252 Injection Pump Fuel Metering Control "A" Range/Performance (Cam/Rotor/Injector)
P1688 Metering Oil Pump Stepping Motor Circuit Malfunction
MB Star V2013.03

I am really sorry but this is way over the head of most owners, you need the factory manuals and the special training and equip to diagnose this and repair it.

i dont believe in the s5 rx7 there is a way to disable the MOP without getting an aftermarket ecu. Ill do some searching for your, but im 98% sure you cant.

P-1689 NO COMMUNICATION BETWEEN ECM & INJECTION
PUMP MODULE

You will have to have the fault codes read and removed. If it is permanently in limp mode it may suggest another problem.