Error Code P1280 has different definitions but usually refers to a problem in the Fuel System Relay Circuit, or Injection Control Pressure (ICP).

Unlike many error codes, this code is a manufacturer specific code, which means it doesn’t apply to all vehicles with OBD-II system, or vehicles made since 1996 up to present. Rather, it pertains to a select few vehicles manufacturers, most commonly among Ford, Chrysler, Dodge, Jeep, GM, Volkswagen, Audi, Plymouth, Oldsmobile, Citroen, Peugeot, and Volvo. Specifications on the definition, troubleshooting, and repairs vary from one make and model to another.


The standard definition for Error Code P1280 is Air Control Valve for injection valve: through-flow too small.

Common Symptoms

Check Engine light is triggered in this Error Code. Other symptoms vary from the make of the vehicle.

Possible Causes

This code is electrical in nature and usually caused by shorts between red and white IPR (injection pressure regulator) wires or red IPS wire and ground. In rare cases, it can also be caused by a faulty PCM. Other possible caused is clogged hoses.

How to Check

  • To diagnose for this code, check the hoses as well as the air control valve for the injectors.
  • To test for the error, the coolant temperature should be at least 80 °C
  • Test hose for clogs
  • Conduct an electric test for the air control valve for injectors.

How to Fix

This error code is a tricky problem to solve, and there is minimal information about it available.  It is best to take your vehicle to your dealer or a certified technician, as they have the complete tools and expertise to solve such problem.

Typical repairs, however, is to repair or replace the clogged hose, if that is what is causing the problem based on your diagnosis.

Another good way to check and fix is to unplug the ICP (injection control pressure) sensor it and check for oil. If there’s oil, then it’s a tell-tale sign that is has gone bad.