P145B Engine Trouble Code
What is P145B?
P145B 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 Powertrain (P) Trouble Code |
| System: | Powertrain |
| Code: | P145B |
P145B 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
P145B Code Structure
Understanding what each digit means in the P145B powertrain trouble code:
| P | 1 | 4 | 5 | b |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | O2 Sensor Heater Circuit Malfunction | Cylinder 1 Injector Circuit Low | System Malfunction |
How to Fix P145B
Diagnostic Steps:
Regarding P145B, 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:
A/C pressure sensor monitors refrigerant pressure changes. DTC sets when pressure change falls outside calibration. Verify A/C system function, refrigerant charge, and electrical connections.
Technical Notes:
For P145B, verify VCT solenoid operation. Look for stuck or sticking valves caused by contamination. Consult vehicle-specific repair manual for proper component testing procedures.
P145B Description
P145B engine trouble code is related to System Malfunction.
Main Cause
The primary reason for P145B OBD-II Engine Trouble Code is: O2 Sensor Heater Circuit Malfunction.