B1432 Diagnostic Trouble Code

B1432 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 B1432 diagnostic trouble code may include:

Fuel pressure too high
Diminished fuel efficiency
Rich or lean exhaust
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

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
Faulty IMRC actuator relay (if equipped)

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. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code B1432 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 B1432.

Fortunately, B1432 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1432 Trouble Code For Specific Cars

B1432 Nissan Cima Closed Throttle Position Switch Malfunction
B1432 Lanchester 30 Speed Control Unable to Hold Speed
B1432 Plymouth Breeze Evaporative Emission Control System Malfunction
B1432 Mercedes-benz 14 Air Bag Driver Inflator Circuit Resistance Low on Squib
B1432 Oldsmobile Jetfire Cylinder Head Temp Sensor High Input
B1432 Volkswagen Iltis Right Front Center Sensor Circuit Fault
B1432 Ford Taunus Mirror Passenger Vertical Feedback Potentiometer Circuit Failure