Low acceleration. The check engine light appears randomly. The code states Terminal 87 under voltage. why

[Shawn F]

After changing the battery and alternator, started to received random check engine lights a couple weeks later. The meeter gave a few codes which are listed as
C1210-000 Unknown Fault Code
C1401-016 A&/3m1 (high pressure and return pump)
C1010-008 Terminal 87 Undervoltage
C1140-008 N49 (steering Angle Sensor)

The vehicle either picks up slowly or don't accelerate pass 60.

Any suggestions?

 

[pgh13]

Hi Shawn, welcome to the forum.

Some more info may help.....
Model, age, mileage. Also, whereabouts are you situated? Sometimes the best advice is to get codes read by a Mercedes independent garage as opposed to a generic reader

 

[LostKiwi]

Why did you change the battery and alternator?