P0432 engine code - Liberty Jeep Cars & Trucks

P0432 ? OBD2 engine code ?

P0432 Main Catalyst Efficiency Below Threshold Bank 2

Take it to a qualified repair shop an have it diagnosed

You made the classic DIY mistake--replacing whatever part is listed in the trouble code without doing any diagnostic work. P0155 relates the o2 sensor HEATER circuit. That can be caused by an open wire or a blown fuse. Until you fix that, the oxygen sensors won't work properly and that can cause a P0432. First fix the P0155 issue

Then fix the P0455 Evaporative Emission Control System Leak Detected (gross leak) issue. THEN see if the P0432 goes away.

MUFFLER MIGHT BE PLUGED

The P0432 means "Main Catalyst Efficiency Below Threshold (Bank 2), the problem is there.
New relase obd2 code scannner named maxiscan ms509

• Most of the time a P0423 code alone is the Catalytic Converter.
• An exhaust manifold leak can cause this code too.
• You can have a leak test performed on your exhaust and see if this is causing the code but it is more than likely your CAT.
• If your engine is using an obsessive amount of oil or coolant this can cause that code too, a base engine problem that is.

• If you have any comments please feel free to leave them here.
• Hope this helps and thank you for using FixYa.

Regards, Tony

P0432 - Main Catalyst Efficiency Below Threshold Bank 2
The ECM or PCM monitors the front an rear O2 sensors. The ECM or PCM detects Warm up Catalytic Converter when the sensors are out of specifications.

DTC is set when the ECM or PCM detects rear HO2S value difference becomes closer to value of front HO2S. The ECM or PCM monitors when vehicle speed is 25-60 MPH, load is 22-45 percent and engine speed is 1000-3000 RPM.

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes
- Warm Up Three Way Catalytic converter deterioration or malfunction. - Exhaust system leaks. - Loose front or rear HO2Ss. - Front HO2S malfunction. - O2 sensors harness or connectors

Possible solution
- Replaced Catalytic Converter - Replaced rear O2 sensor - Repair wire harness or connectors

Check it ans tell us news.

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Not necessarily, the catalyst monitor uses two oxygen sensors to monitor the operation of the converter. One or both of the sensors may need replacement. One tip, they are much easier to remove from a hot system, although the chance of a burn is greater.

what do the codes mean? it could also be oxygen sensors

P0122 - Throttle Position (TP) Sensor Circuit Low Voltage
P0123 - Throttle Position (TP) Sensor Circuit High Voltage
without checking it 1st I would guess the TPS is most likely defective.
P0432 - Catalyst System Low Efficiency Bank 2, you may have to replace the Catalytic convertor, it may be worn out,
A WORD OF CAUTION: Don't use aftermarket cats, they tend to reset the same code due to compatibility issues, also replace the cat monitor sensor (looks like an O2 sensor) located just to the rear of the bank 2 cat converter.