B1425 Diagnostic Trouble Code

B1425 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 B1425 diagnostic trouble code may include:

Lack of power
Faulty O2 Sensor
Poor 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
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

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. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code B1425 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 B1425.

Fortunately, B1425 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1425 Trouble Code For Specific Cars

B1425 Porsche 996 Fuel Level Sensor Circuit Range/Performance
B1425 Healey Tickford Passengers Seat Belt Buckle Switch Circuit Short to Battery
B1425 Buick Model 2x-4x Cylinder 9 Contribution/Balance Fault
B1425 Healey Nash-healey Passenger's Front Seat Down Switch Circuit Short to Battery
B1425 Geely Mk Oil Change Lamp Circuit Failure
B1425 Opel Zafira Door Lock Cylinder Circuit Open
B1425 Nag Voran Camshaft Position Sensor Circuit Low Input