B1720 Engine Trouble Code
What is B1720?
The B1720 check-engine light can indicate issues ranging from minor (loose gas cap) to serious (catalytic converter failure). Professional diagnostic scanning at a dealer or shop will identify the exact cause and required repairs.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Code: | B1720 |
B1720 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
B1720 Code Structure
Understanding what each digit means in the B1720 body trouble code:
| B | 1 | 7 | 2 | 0 |
|---|---|---|---|---|
| Body Code | Fuel And Air Metering | Fuel Rail Pressure Sensor Circuit Malfunction | Turbocharger Boost Sensor A Circuit Low | Shift Solenoid E Performance or Stuck Off |
How to Fix B1720
Diagnostic Steps:
Check if fuel pump primes when key is turned to ON. Measure fuel pressure and verify bright white-blue spark at all plugs. Also verify mechanical timing alignment.
Repair Solution:
Most manufacturers number cylinders sequentially from front to back. Ford V-engines start with cylinder 1 at front left. In V-6 engines, cylinder 4 is front right; in V-8 engines, cylinder 5 occupies that position.
Technical Notes:
For B1720, verify VCT solenoid operation. Look for stuck or sticking valves caused by contamination. Consult vehicle-specific repair manual for proper component testing procedures.
B1720 Description
B1720 engine trouble code is related to Shift Solenoid E Performance or Stuck Off.
Main Cause
The primary reason for B1720 OBD-II Engine Trouble Code is: Fuel Rail Pressure Sensor Circuit Malfunction.