B29B8 Diagnostic Trouble Code

B29B8 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 B29B8 diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
Hesitation upon acceleration

Possible Causes :

A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
Dirty air cleaner element Damaged DPF
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 :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code B29B8 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 B29B8.

Fortunately, B29B8 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B29B8 Trouble Code For Specific Cars

B29B8 Ferrari 328 Insufficient Engine Speed Increase During Self Test
B29B8 Cadillac Allante Damper RR Circuit Open
B29B8 Saleen S7 Ignition/Distributor Engine Speed Input Circuit Range/Performance
B29B8 Mercedes-benz Cls Class Air Suspension Compressor Relay Circuit Open
B29B8 Steyr-puch Haflinger Lamp Turn Signal Left Circuit Open
B29B8 Case Jic Door Ajar Lamp Circuit Failure
B29B8 Honda Acura Mdx Pressure Control Solenoid B Electrical