U2807 Diagnostic Trouble Code

U2807 is a kind of OBD-II Diagnostic U-Network 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 U2807 diagnostic trouble code may include:

Possible spark knock (detonation / pre-ignition)
Poor fuel economy
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code U2807 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 U2807.

Fortunately, U2807 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2807 Trouble Code For Specific Cars

U2807 Dodge Stratus Ii Ignition Switch Illegal Input Code
U2807 Aston Martin V12 Air Suspension Warning Lamp Circuit Failure
U2807 Bmw L Clutch Actuator Circuit High
U2807 Chevrolet California Driver Power Window Down Switch Circuit Failure
U2807 Bertone Stratos Brake Pedal Input Circuit Failure
U2807 Suzuki Samurai Mirror Driver Horizontal Switch Circuit Short To Ground
U2807 De Soto Firesweep Horn Output Relay Circuit Short to Battery