Global Direct Fit Converters come with all necessary gaskets. In some cases common clamps and nut and bolt hardware may be needed which is locally available at most auto parts and hardware stores. The Limited Lifetime Warranty Registration card is also included with all new Converters.

“Heated” type oxygen sensors have a built-in heater which heats the sensors. Much less exhaust gas needs to contact the ceramic element, making these sensors less prone to contamination.

“Heated” type sensors can also be located further downstream, (closer to the catalytic converter), which increases their life expectancy. “Heated” type oxygen sensors should be checked or replaced every 60,000 to 100,000 miles.

Failures can occur either: 1) instantaneously at the time the contaminant contacts the oxygen sensor, causing a dead sensor, or 2) gradually over a period of time. Gradual deterioration results in a “slow” sensor which does not react as quickly as it should, causing the catalytic converter to perform less efficiently. This can lead to premature failure of the catalytic converter.

“Slow” oxygen sensors can cause a drop in fuel economy of 10-15% and cause excessive exhaust emissions and poor drivability. Unfortunately, the symptoms of a “slow” oxygen sensor are not always obvious to the vehicle owner, unless the vehicle fails an emissions test, a decline in fuel economy is noticed, or drivability problems occur.

A “dead” sensor can be detected with a relatively inexpensive digital volt-ohmmeter. A “slow” sensor can only be diagnosed by using a digital oscilloscope or scope meter. Most installers will probably not be able to spot an oxygen sensor problem until it is too late, and the catalytic converter is already well on its way to failure.

• Check Engine for other codes and Technical Service Bulletins (TSB’s)
• Engines with excess of 50,000 miles should be de-carbonized !!!!
• Check EGR vale for proper operation. Make sure EGR ports are clean and open.
• Check for engine mis-fires. Coil Paks – Spark Plugs – Plug Wires
• Check fuel delivery system. Rich mixture – dirty injectors – pressure regulator and EVAP issues.
• Check for intake and exhaust leaks. Air – Vacuum – Fluid
• Check or replace ALL Oxygen Sensors
• Check engine thermostat for proper operation.
• Check & Clean MASS Air Flow Sensor.
• Check ALL Coolant & Engine Temperature Sensors

Check for obvious signs of road damage to the converter and signs of excessive heat (blue and purple coloring of the converter or heat shield). Check for proper air flow out of the tailpipe. Check for excessive carbon in the tail pipe.

Something fails in the engine management system to damage them or keep them from doing their job. Also, make sure to de-carbonize all engines over 50,000 miles.

PO 420 Code…What do I do first?

Things to check related to PO 420 Codes:

• Check Engine for other codes and Technical Service Bulletins (TSB’s)
• Engines with excess of 50,000 miles should be de-carbonized !!!!
• Check EGR vale for proper operation. Make sure EGR ports are clean and open.
• Check for engine mis-fires. Coil Paks – Spark Plugs – Plug Wires
• Check fuel delivery system. Rich mixture – dirty injectors – pressure regulator and EVAP issues.
• Check for intake and exhaust leaks. Air – Vacuum – Fluid
• Check or replace ALL Oxygen Sensors
• Check engine thermostat for proper operation.
• Check & Clean MASS Air Flow Sensor.
• Check ALL Coolant & Engine Temperature

Check for obvious signs of road damage to the converter and signs of excessive heat (blue and purple coloring of the converter or heat shield). Check for proper air flow out of the tailpipe. Check for excessive carbon in the tail pipe.

Liter to Cubic Inch:
1 Liter = 61.02 cubic inches
Example: 5.8(5.75289) x 61.02 = 351 cubic inches