C2128 Diagnostic Trouble Code

C2128 is a kind of OBD-II Diagnostic C-Chassis Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a C2128 diagnostic trouble code may include:

Fuel pressure too high
Diminished fuel efficiency
Rich or lean exhaust
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Dirty air cleaner element Damaged DPF
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
Faulty IMRC actuator relay (if equipped)

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code C2128 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before C2128.

Fortunately, C2128 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2128 Trouble Code For Specific Cars

C2128 Ferrari Mondial IPR Circuit Failure
C2128 Toyota Estima O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)
C2128 Riley Elf Horn Relay Coil Circuit Short to Vbatt
C2128 Delage Delage Hydraulic Oil Temperature Sensor Circuit Low Input
C2128 Standard Companion Lamp Headlamp Low-Beam Circuit Failure
C2128 Jaguar Xk-ss Seat Driver Rear Down Circuit Short To Battery
C2128 Proton Tiara Fuel Tank Temperature Sensor Circuit Malfunction