Mitsubishi Lancer Evo 10 P1260 Engine Trouble Code
What is Mitsubishi Lancer Evo 10 P1260?
The Mitsubishi Lancer Evo 10 P1260 check-engine light can indicate issues ranging from minor (loose gas cap) to serious (catalytic converter failure). Professional diagnostic scanning at a dealer or shop will identify the exact cause and required repairs.
P1260 on the Mitsubishi Lancer Evo 10
On the Mitsubishi Lancer Evo 10, a secondary air injection pump that has seized due to moisture ingress is a common trigger for P1260. The fault is usually only present on cold starts and clears itself after two to three warm-up cycles, making it easy to overlook.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Vehicle: | Mitsubishi Lancer Evo 10 |
| Brand: | Mitsubishi |
| Model: | Lancer Evo 10 |
| Code: | P1260 |
P1260 Mitsubishi Lancer Evo 10 Symptoms
Check Engine Light
Illuminated Mitsubishi Lancer Evo 10 dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Mitsubishi Lancer Evo 10
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Mitsubishi Lancer Evo 10
Increased Emissions
Failed emissions test due to P1260
P1260 Code Structure
Understanding what each digit means in the P1260 powertrain trouble code:
| P | 1 | 2 | 6 | 0 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Manifold Absolute Pressure/Barometric Pressure Circuit High Input | Cylinder 4 Contribution/Balance Fault | Shift Solenoid E Performance or Stuck Off |
How to Fix Mitsubishi Lancer Evo 10 P1260
Diagnostic Steps:
Check if fuel pump primes when key is turned to ON. Measure fuel pressure and verify bright white-blue spark at all plugs. Also verify mechanical timing alignment.
Repair Solution:
Crankshaft position sensor signals the computer for precise ignition and fuel injection timing. Faulty sensors cause rough running and reduced efficiency. Modern vehicles enter limp mode and illuminate the check-engine light.
Technical Notes:
Parts or components should not be replaced based solely on P1260 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
Mitsubishi Lancer Evo 10 P1260 Repair Cost
Fuel injector cleaning service on the Mitsubishi Lancer Evo 10 costs $150–$300 for an ultrasonic bench-clean of all injectors with flow-test certification. On-car induction cleaning is a cheaper ($80–$120) first step but is less thorough for heavily fouled injectors.
P1260 Description
P1260 OBD-II Trouble Code: Theft Detected Vehicle Immobilized is one of the definitions for the P1260; however your vehicles manufacturer may have a different definition for the P1260 code. Please check below for your specific
Main Cause
The primary reason for P1260 OBD-II Engine Trouble Code is: Manifold Absolute Pressure/Barometric Pressure Circuit High Input.
Common P1260 Misdiagnosis on the Mitsubishi Lancer Evo 10
Replacing the PCM/ECU on the Mitsubishi Lancer Evo 10 for a persistent P1260 is a last-resort action that is often performed prematurely. Statistically, less than 2% of P1260 faults on this platform originate in the ECU; wiring, sensors, and mechanical causes account for the remainder.
DIY Repair Guide: P1260 on Mitsubishi Lancer Evo 10
The fuel pressure test on the Mitsubishi Lancer Evo 10 requires a Schrader-valve type fuel pressure gauge ($25–$40) connected to the fuel rail test port. With the ignition ON (engine off), pressure should hold above 30 PSI for two minutes. A rapid drop confirms a leaking injector or failing regulator as the root cause of P1260.
Preventing P1260 on the Mitsubishi Lancer Evo 10
Ensure the Mitsubishi Lancer Evo 10 oil cap and dipstick tube seal are airtight. Even a small crank-case vacuum leak can cause the PCM to log P1260 and, over time, allows moisture-laden air to degrade the engine oil faster than the scheduled service interval.
Frequently Asked Questions — Mitsubishi Lancer Evo 10 P1260
A: Contaminated or low-octane fuel can temporarily trigger P1260 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.