B253E Diagnostic Trouble Code

B253E 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 B253E diagnostic trouble code may include:

Vacuum leak on the engine
Reduction in engine performance, especially at low RPM levels
Engine surge
Poor acceleration

Possible Causes :

Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
An air leak forward of the DPF will change the sensor readings resulting in the code
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code B253E 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 B253E.

Fortunately, B253E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B253E Trouble Code For Specific Cars

B253E Holden Fc Port Air Relief Circuit Malfunction
B253E Bmw 316 Catalyst System Efficiency Below Threshold (Bank 1)
B253E Volvo 142
B253E Lotus 25 Torque Converter Clutch Control Error
B253E Britannia Gt Crankshaft Position Sensor B Circuit Low Input
B253E Rover 75 Ignition Coil C Secondary Circuit Malfunction
B253E Saab 90 Ignition Run/Start Circuit Failure