B0722 Engine Trouble Code
What is B0722?
B0722 indicates potential catalytic converter failure. If completely failed, your vehicle may not run properly and fuel economy will suffer significantly. Average replacement cost is $2,000–$2,140. This repair requires professional service and should not be delayed.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Code: | B0722 |
B0722 Symptoms
Check Engine Light
Illuminated dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration
Starting Problems
Difficulty starting the engine
B0722 Code Structure
Understanding what each digit means in the B0722 body trouble code:
| B | 0 | 7 | 2 | 2 |
|---|---|---|---|---|
| Body Code | Intake Valve Control Solenoid Circuit Low | Fuel Rail Pressure Sensor Circuit Malfunction | Turbocharger Boost Sensor A Circuit Low | Glow Plug/Heater Circuit 'A' Malfunction |
How to Fix B0722
Diagnostic Steps:
The catalytic converter has oxygen sensors before and after it. When warm and in closed-loop mode, the upstream O2 sensor reading should fluctuate, while downstream should remain steady.
Repair Solution:
Firing order is engineered to minimise vibration. Altering firing order results in mistimed ignition and poor engine operation. Consult vehicle-specific repair manual for correct firing order.
Technical Notes:
B0722 on electronically controlled automatic transmissions relates to shift solenoid operation. The solenoid actuates hydraulic circuits controlling clutches or bands for gear changes.
B0722 Description
B0722 engine trouble code is related to Glow Plug/Heater Circuit 'A' Malfunction.
Main Cause
The primary reason for B0722 OBD-II Engine Trouble Code is: Fuel Rail Pressure Sensor Circuit Malfunction.