Bristol Britannia P273D Engine Trouble Code
What is Bristol Britannia P273D?
With Bristol Britannia 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 Bristol Britannia
The Bristol Britannia has a known weak point in the lambda sensor wiring loom where it passes through the floor pan grommet. Road salt and vibration cause the insulation to crack at this point, creating an intermittent open circuit that stores P273D without a consistent symptom.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Vehicle: | Bristol Britannia |
| Brand: | Bristol |
| Model: | Britannia |
| Code: | P273D |
P273D Bristol Britannia Symptoms
Check Engine Light
Illuminated Bristol Britannia dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Bristol Britannia
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Bristol Britannia
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 Bristol Britannia 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:
Brake switch circuit concerns may involve open or shorted BPP circuits, damaged switches, or misadjustment. Verify stoplight function and follow proper self-test procedures per service manual.
Technical Notes:
P273D DTC indicating a sensor fault does not always mean the sensor itself is bad. The issue may stem from the systems being monitored or even the sensor wiring. Proper diagnosis is essential.
Bristol Britannia P273D Repair Cost
MAF sensor replacement on the Bristol Britannia for a P273D fault runs $220–$380 at a franchised dealer. OEM-equivalent aftermarket sensors are available for $80–$130 and are a reliable option for vehicles outside the factory warranty period.
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 Bristol Britannia
The Bristol Britannia knock sensor shares its harness with the coolant temperature sensor. A corroded shared ground causes both sensors to report out-of-range values simultaneously, leading to misdiagnosis of P273D as a knock sensor fault when the root cause is the shared ground splice.
DIY Repair Guide: P273D on Bristol Britannia
The throttle body on the Bristol Britannia can be cleaned without full removal. Use a clean rag and throttle body cleaner spray with the engine off and cool. After cleaning, an idle relearn is mandatory: disconnect the battery for 10 minutes, reconnect, and allow the engine to idle for 10 minutes undisturbed.
Preventing P273D on the Bristol Britannia
Inspecting the Bristol Britannia wiring harness conduit grommets annually — especially the floor pan grommet — costs nothing and takes 10 minutes. Catching moisture ingress early eliminates the most common electrical trigger for P273D on this model.
Frequently Asked Questions — Bristol Britannia P273D
A: Temporarily clearing P273D can help determine whether it is intermittent or persistent, but it does not fix the underlying fault. The code will return if the problem is still present. Do not clear codes just before an emissions test without a proper drive cycle.