B1997 Diagnostic Trouble Code

B1997 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 B1997 diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
Defective ECU strategies or components will prevent proper regeneration

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. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code B1997 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 B1997.

Fortunately, B1997 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1997 Trouble Code For Specific Cars

B1997 Daihatsu Sonica Glow Plug Circuit Low Input (Bank #2)
B1997 Kaiser Dragon Seat Horizontal Forward/Rearward Potentiometer Feedback Circuit Failure
B1997 Mazda Kabura Turbo Boost Pressure Not Detected
B1997 Cadillac Solitaire Dim Panel Increase Input Circuit Short To Ground
B1997 Lea-francis 18 System Voltage Unstable
B1997 Honda Pilot Rear Cargo Door Unlock Circuit Open
B1997 Volkswagen Caddy 2 RESCU/VEMS Input Circuit Open