Fiat 2 P273D Engine Trouble Code
What is Fiat 2 P273D?
With Fiat 2 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 Fiat 2
The Fiat 2 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: | Fiat 2 |
| Brand: | Fiat |
| Model: | 2 |
| Code: | P273D |
P273D Fiat 2 Symptoms
Check Engine Light
Illuminated Fiat 2 dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Fiat 2
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Fiat 2
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 Fiat 2 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:
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:
P273D 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.
Fiat 2 P273D Repair Cost
A complete diagnostic health-check on the Fiat 2 before committing to any single repair costs $120–$180 at a dealership with live-data capability. This investment pays for itself if it prevents unnecessary part replacement, which is the single most common mistake when diagnosing P273D.
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 Fiat 2
Some Fiat 2 models have a known software bug where the PCM flags P273D after battery disconnection and reconnect. Always perform an ECU adaptation reset and drive cycle before ordering any parts following battery work.
DIY Repair Guide: P273D on Fiat 2
Replacing the spark plugs on the Fiat 2 is rated a difficulty 2/5 for home mechanics. The top-mounted plug access on this engine requires a 3/8" extension and a 14mm spark plug socket. Always torque to the manufacturer's specification to avoid cracking the cylinder head.
Preventing P273D on the Fiat 2
For turbocharged Fiat 2 models, allowing the engine to idle for 60–90 seconds before shutdown after hard driving reduces turbocharger heat soak and prevents the coking of oil that blocks VVT galleries — a known secondary trigger of P273D.
Frequently Asked Questions — Fiat 2 P273D
A: Yes. Any stored fault code — including P273D — will cause an automatic failure in most OBD-II based emissions tests. The code must be resolved and the vehicle must complete a full OBD drive cycle with no new codes before the test.