Pierce-arrow Series P273D Engine Trouble Code
What is Pierce-arrow Series P273D?
With Pierce-arrow Series P273D, you may drive for several weeks with a malfunctioning MAF sensor, but expect decreased fuel economy and eventual stalling. Shop replacement costs $240–$400 depending on vehicle. The labour is straightforward, with most cost from the part itself.
P273D on the Pierce-arrow Series
The Pierce-arrow Series ECU flash version prior to the 2.4.1 update has a known calibration bug that can generate spurious P273D codes under hard deceleration. Verifying the ECU software version is always the first step before any mechanical diagnosis on this model.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Vehicle: | Pierce-arrow Series |
| Brand: | Pierce-arrow |
| Model: | Series |
| Code: | P273D |
P273D Pierce-arrow Series Symptoms
Check Engine Light
Illuminated Pierce-arrow Series dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Pierce-arrow Series
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Pierce-arrow Series
Increased Emissions
Failed emissions test due to P273D
P273D Code Structure
Understanding what each digit means in the P273D powertrain trouble code:
| P | 2 | 7 | 3 | d |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering (Injector Circuit Malfunctions Only) | Fuel Rail Pressure Sensor Circuit Malfunction | Injection Pump Fuel Metering Control 'A' High | System Malfunction |
How to Fix Pierce-arrow Series P273D
Diagnostic Steps:
Poor running symptoms align with MAP sensor malfunction. In some cases, a faulty MAP sensor will not trigger a code. The issue may represent separate wiring concerns requiring individual diagnosis.
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 P273D, verify VCT solenoid operation. Look for stuck or sticking valves caused by contamination. Consult vehicle-specific repair manual for proper component testing procedures.
Pierce-arrow Series P273D Repair Cost
Replacing the lambda (O2) sensor wiring loom section on the Pierce-arrow Series costs $90–$160 at a body shop or auto-electrician. This is far cheaper than replacing the sensor itself when the sensor is otherwise functional — always inspect wiring before condemning sensors.
P273D Description
P273D engine trouble code is related to System Malfunction.
Main Cause
The primary reason for P273D OBD-II Engine Trouble Code is: Fuel Rail Pressure Sensor Circuit Malfunction.
Common P273D Misdiagnosis on the Pierce-arrow Series
Workshop technicians sometimes replace the entire ignition coil assembly on the Pierce-arrow Series when P273D accompanies a cylinder-specific misfire. In many cases, only the spark plug in the misfiring cylinder has fouled; a $8 plug replaces a $140 coil pack.
DIY Repair Guide: P273D on Pierce-arrow Series
The coolant temperature sensor on the Pierce-arrow Series is a straightforward DIY item (difficulty 2/5). Have a drain tray ready for the small amount of coolant that spills when the sensor is removed. Top up the cooling system afterwards and check for air pockets.
Preventing P273D on the Pierce-arrow Series
The Pierce-arrow Series EVAP system requires the fuel tank breather hoses to be flexible and crack-free. A visual inspection at every oil change prevents the slow vacuum leak that triggers P273D without any drivability symptom.
Frequently Asked Questions — Pierce-arrow Series P273D
A: Contaminated or low-octane fuel can temporarily trigger P273D through knock retard and lean/rich excursion events. If the code appeared shortly after a fill-up at an unfamiliar station, running the tank close to empty and refuelling with premium is a sensible first step.