P1E43 Engine Trouble Code
What is P1E43?
P1E43 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: | P1E43 |
P1E43 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
P1E43 Code Structure
Understanding what each digit means in the P1E43 powertrain trouble code:
| P | 1 | e | 4 | 3 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Fuel Pump Module Control Circuit Range/Performance | Injection Pump Fuel Metering Control 'B' High | Exhaust Gas Recirculation Sensor B Circuit High |
How to Fix P1E43
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:
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:
P1E43 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.
P1E43 Description
P1E43 engine trouble code is related to Exhaust Gas Recirculation Sensor B Circuit High.
Main Cause
The primary reason for P1E43 OBD-II Engine Trouble Code is: Fuel Pump Module Control Circuit Range/Performance.