P243E Engine Trouble Code
What is P243E?
P243E 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: | P243E |
P243E 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
P243E Code Structure
Understanding what each digit means in the P243E powertrain trouble code:
| P | 2 | 4 | 3 | e |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering (Injector Circuit Malfunctions Only) | O2 Sensor Heater Circuit Malfunction | Injection Pump Fuel Metering Control 'A' High | System Malfunction |
How to Fix P243E
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:
VSS concerns may stem from noisy input signals caused by RFI/EMI from ignition wires, charging circuits, or aftermarket equipment. Verify VSS reads 0 mph when transmission is in Park.
Technical Notes:
P243E DTC specifically relates to camshaft timing. When cam timing is over-retarded, the check-engine light illuminates and this code sets. Verify VCT solenoid operation and check for contamination.
P243E Description
P243E engine trouble code is related to System Malfunction.
Main Cause
The primary reason for P243E OBD-II Engine Trouble Code is: O2 Sensor Heater Circuit Malfunction.