B1808 Diagnostic Trouble Code

B1808 is a kind of OBD-II Diagnostic B-Body 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 B1808 diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
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.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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 B1808 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 B1808.

Fortunately, B1808 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1808 Trouble Code For Specific Cars

B1808 Isuzu Kai
B1808 Ferrari Testarossa Keyless Entry Circuit Short To Battery
B1808 Daimler Limousine Heated Backlite Input Circuit Short To Battery
B1808 Delahaye 235 Hydraulic Pressure Sensor Circuit High Input
B1808 Ford Taurus Mirror Passenger Vertical Feedback Potentiometer Circuit Open
B1808 Cadillac Escalade Decklid Punch-Out Sensor Open Circuit
B1808 Chevrolet Omega EGR Metering Orifice Restricted