C0045 Diagnostic Trouble Code

C0045 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 C0045 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code C0045 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 C0045.

Fortunately, C0045 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0045 Trouble Code For Specific Cars

C0045 Renault Type A HO2S Heater Control Circuit Low (Bank 1 Sensor 3)
C0045 Toyota Sport Passenger Airbag Disable Module Sensor Obstructed
C0045 Mercedes S 320 Additional Fan Relay Circuit Malfunction
C0045 Fiat 35 Hp Lamp Air Bag Warning Indicator Circuit Failure
C0045 Willys-overland 675
C0045 Holden Vh Power Window RR Motor Circuit Short To Ground
C0045 Datsun On-do HO2S Heater Control Circuit (Bank 2 Sensor 2)