P1484 Engine Trouble Code
What is P1484?
P1484 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 Powertrain (P) Trouble Code |
| System: | Powertrain |
| Code: | P1484 |
P1484 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
P1484 Code Structure
Understanding what each digit means in the P1484 powertrain trouble code:
| P | 1 | 4 | 8 | 4 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | O2 Sensor Heater Circuit Malfunction | Ignition/Distributor Engine Speed Input Circuit Malfunction | Timing Reference High Resolution Signal A Too Many Pulses |
How to Fix P1484
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:
P1484 on electronically controlled automatic transmissions relates to shift solenoid operation. The solenoid actuates hydraulic circuits controlling clutches or bands for gear changes.
P1484 Description
P1484 OBD-II Trouble Code: Open Power To Ground VCRM is one of the definitions for the P1484; however your vehicles manufacturer may have a different definition for the P1484 code. Please check below for your specific make.
Main Cause
The primary reason for P1484 OBD-II Engine Trouble Code is: O2 Sensor Heater Circuit Malfunction.