P112D Engine Trouble Code
What is P112D?
P112D 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: | P112D |
P112D 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
P112D Code Structure
Understanding what each digit means in the P112D powertrain trouble code:
| P | 1 | 1 | 2 | d |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Fuel Rail/System Pressure — Too High | Turbocharger Boost Sensor A Circuit Low | System Malfunction |
How to Fix P112D
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:
Most manufacturers number cylinders sequentially from front to back. Ford V-engines start with cylinder 1 at front left. In V-6 engines, cylinder 4 is front right; in V-8 engines, cylinder 5 occupies that position.
Technical Notes:
For P112D, verify VCT solenoid operation. Look for stuck or sticking valves caused by contamination. Consult vehicle-specific repair manual for proper component testing procedures.
P112D Description
P112D engine trouble code is related to System Malfunction.
Main Cause
The primary reason for P112D OBD-II Engine Trouble Code is: Fuel Rail/System Pressure — Too High.