Mercedes-benz W123 P721B Engine Trouble Code

Mercedes-benz W123 P721B 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-benz W123 P721B Code Meaning :

When you check Mercedes-benz W123 car engine light came on code P721B the reason should be . However manufacturer may have a different definition for the P721B OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

P721B OBD-II Diagnostic Powertrain (P) Trouble Code Description

P721B engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Reason For P721B Code

The reason of P721B OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

P721B 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.

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