P1455 Engine Trouble Code
What is P1455?
P1455 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: | P1455 |
P1455 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
P1455 Code Structure
Understanding what each digit means in the P1455 powertrain trouble code:
| P | 1 | 4 | 5 | 5 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | O2 Sensor Heater Circuit Malfunction | Cylinder 1 Injector Circuit Low | Crankshaft Position Sensor B Circuit Malfunction |
How to Fix P1455
Diagnostic Steps:
Regarding P1455, 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:
Disconnected, dirty, or fouled spark plugs commonly prevent proper engine operation. Replace spark plugs every season or 25 hours. Verify proper spark plug gap. If plugs are good, check ignition components: spark plug wires, coils, and ignition module.
Technical Notes:
Parts or components should not be replaced based solely on P1455 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
P1455 Description
P1455 OBD-II Trouble Code: Fuel Tank Sending Unit Open or Short is one of the definitions for the P1455; however your vehicles manufacturer may have a different definition for the P1455 code. Please check below for your specifi
Main Cause
The primary reason for P1455 OBD-II Engine Trouble Code is: O2 Sensor Heater Circuit Malfunction.