B1693 Diagnostic Trouble Code

B1693 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 B1693 diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

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. If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve.

Process Tips

Diagnostic trouble code B1693 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 B1693.

Fortunately, B1693 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1693 Trouble Code For Specific Cars

B1693 Porsche 931 Fuel Filler Door Circuit Open
B1693 Holden Kingswood Power Steering Pressure Sensor Circuit High Input
B1693 Vauxhall Viceroy Pressure Control Solenoid Intermittent
B1693 Graham Streak Passenger Power Window Motor Circuit Open
B1693 Smart Fortwo Ii Lamp Anti-Theft Indicator Circuit Failure
B1693 Mercedes-benz Cl Class Air Pressure Low Circuit Short to Gnd
B1693 Infiniti G20 SCP (J1850) Invalid or Missing Data for Experimental #4