B3572 Engine Trouble Code
What is B3572?
B3572 code can indicate a faulty oxygen sensor, which may eventually damage the catalytic converter (repair cost: $2,000–$2,200). Professional diagnosis costs around $200–$210. Oxygen sensors are often straightforward to replace — check your owner's manual for location and instructions. This issue should be addressed promptly to prevent further damage.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Code: | B3572 |
B3572 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
B3572 Code Structure
Understanding what each digit means in the B3572 body trouble code:
| B | 3 | 5 | 7 | 2 |
|---|---|---|---|---|
| Body Code | Ignition System Or Misfire | Fuel Composition Sensor Circuit Malfunction | Cylinder 10 Contribution/Balance Fault | Glow Plug/Heater Circuit 'A' Malfunction |
How to Fix B3572
Diagnostic Steps:
Regarding B3572, carefully inspect the wire harness near the intake manifold bracket, best accessed from below near the oil filter. Look for chafing, pinching, or damaged insulation.
Repair Solution:
Power steering pressure switch monitors system operation. If pressure changes are not detected after calibrated speed transitions, this DTC sets. Verify PSP switch operation and check for circuit opens or shorts.
Technical Notes:
B3572 DTCs can be triggered by upstream issues. For example, a dirty MAF sensor may cause incorrect fuel-trim adjustments, leading oxygen sensors to report mixture problems. Address root causes first.
B3572 Description
B3572 engine trouble code is related to Glow Plug/Heater Circuit 'A' Malfunction.
Main Cause
The primary reason for B3572 OBD-II Engine Trouble Code is: Fuel Composition Sensor Circuit Malfunction.