C0145 Diagnostic Trouble Code

C0145 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 C0145 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
Lack of power

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Some aftermarket accessories and performance modifications

Repair Processes :

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C0145 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 C0145.

Fortunately, C0145 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0145 Trouble Code For Specific Cars

C0145 Chevrolet Malibu 6 ECU ROM Checksum Error
C0145 Toyota Crown O2 Sensor Circuit Slow Response (Bank 1 Sensor 3)
C0145 Allard 2.25-litre Air Bag Crash Sensor #2 Ground Circuit Short To Battery
C0145 Intermeccanica Indra SCP (J1850) Invalid or Missing Data for Legislated Diagnostics
C0145 Jensen Interceptor Seat Driver Recline Rearward Switch Circuit Failure
C0145 Ferrari 375 Intake Air Temperature Circuit Range/Performance Problem
C0145 Bugatti Eb112 Cylinder #4 High To Low Side Short