Bmw M P273D Engine Trouble Code
What is Bmw M P273D?
When Bmw M P273D code appears, first check your gas cap. Pull over safely, ensure it is tight, and inspect for cracks. A loose or damaged gas cap affects fuel-system pressure and emissions. A replacement cap costs about $3–$10. This simple fix can resolve the code and improve fuel economy.
P273D on the Bmw M
Independent workshop data shows that Bmw M vehicles with P273D resolve approximately 40% of cases after a throttle body cleaning and idle relearn procedure. This is always the recommended first step before investing in new sensors.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Vehicle: | Bmw M |
| Brand: | Bmw |
| Model: | M |
| Code: | P273D |
P273D Bmw M Symptoms
Check Engine Light
Illuminated Bmw M dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Bmw M
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Bmw M
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 Bmw M P273D
Diagnostic Steps:
Oxygen sensors measure exhaust gas oxygen content to optimise air-fuel ratio. This optimisation improves fuel economy and reduces emissions. Sensors degrade over time and require periodic replacement.
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.
Bmw M P273D Repair Cost
Intercooler hose replacement on turbocharged Bmw M models costs $120–$250 per section. A boost-leak smoke test ($50–$80) is the definitive diagnostic method and will pinpoint exactly which hose or connection is at fault before any parts are ordered.
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 Bmw M
Workshop technicians sometimes replace the entire ignition coil assembly on the Bmw M 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 Bmw M
For the mechanically confident Bmw M owner, a DIY MAF sensor clean is a rewarding first step for P273D. Use a dedicated MAF sensor cleaner spray — not brake cleaner, which damages the sensing element — and allow the sensor to dry for 30 minutes before reinstallation.
Preventing P273D on the Bmw M
On the Bmw M, using a quality fuel system cleaner (added to the fuel tank every 10,000 miles) helps prevent injector deposit build-up that indirectly triggers P273D through fuel-trim imbalances.
Frequently Asked Questions — Bmw M 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.