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 Ferrari 550 Intake Manifold Runner Control (Stuck Open)
B1997 Ford Limited Mirror Driver Switch Assembly Circuit Short To Ground
B1997 Daimler De Headlamp Mode Select Circuit Failure
B1997 Stephens Salient Six Lamp Park Input Circuit Short To Ground
B1997 Mercedes C 180 ABS Hydraulic Pump Motor Circuit Short To Battery
B1997 Tsukuba Sedan Pedal Forward / Rearward Motor Stalled
B1997 Toyota Mega OSS Circuit Intermittent Malfunction