C1443 Diagnostic Trouble Code

C1443 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 C1443 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. 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.

Process Tips

Diagnostic trouble code C1443 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 C1443.

Fortunately, C1443 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1443 Trouble Code For Specific Cars

C1443 Tesla X Missing Latch Signal During Power Sliding Door Unlatch
C1443 Oldsmobile F-85 Cylinder 9 Injector Circuit Low
C1443 Lotus Extreme Traction Control Motor Potentiometer Circuit Open
C1443 Dauer 962 HO2S Heater Control Circuit High (Bank 2 Sensor 2)
C1443 Rover T.3 Ignition Key-In Circuit Failure
C1443 Gaz 27 O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
C1443 Ac 427 A/C Temperature Sensor Out of Range