Mercedes Sl 55 P3978 Engine Trouble Code

Mercedes Sl 55 P3978 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,000 and you can't do it yourself unless you're an experienced mechanic.

Mercedes Sl 55 P3978 Code Meaning :

When you check Mercedes Sl 55 car engine light came on code P3978 the reason should be . However manufacturer may have a different definition for the P3978 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

P3978 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P3978 engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Reason For P3978 Code

The reason of P3978 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

P3978 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

P3977 Previous Engine Trouble Code For Mercedes Sl 55

Next Engine Trouble Code For Mercedes Sl 55 P3979