C1608 Diagnostic Trouble Code

C1608 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 C1608 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
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

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. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code C1608 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 C1608.

Fortunately, C1608 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1608 Trouble Code For Specific Cars

C1608 Elfin Ms Injection Pump Fuel Metering Control "A" High (Cam/Rotor/Injector)
C1608 Ginetta G25 Oil Temperature Sensor Circuit Short To Battery
C1608 Tata Safari Mirror Passenger Vertical Switch Circuit Failure
C1608 Subaru Legacy Left Rear Stop lamp Circuit Failure
C1608 Audi S5 Audio Center Amp is not responding
C1608 Saab 9.5 Ii Ignition Run/Acc Circuit Short To Ground
C1608 Mercedes Slk 350 Air Bag Driver Circuit Failure