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Old 12-20-2011, 07:10 PM
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Check Engine Light

So check engine light came on today and I went to the autoparts store to read the code and they told me the following:

1) Something with the ABS, but did not recommend anything to fix it or say exactly what it was.

2) Med Level of Evap Leak

3) high Level of Evap Leak

Not sure what those may mean...
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Old 12-20-2011, 07:12 PM
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Re: Check Engine Light

You know you could've saved a trip if you looked at this.

http://www.wjjeeps.com/faultcodes.htm

It might have been one of these.

Scan Code:

P0442 (M)

DBR Scan Tool Display:

Evaporative Emission Control System Leak Detected (medium leak)

Description of Diagnostic Trouble Code:

A 0.040 leak has been detected in the evaporative system. (A faulty gas cap may cause this code). Also see TSB 25-001-02A. Note: The respective Powertrain Diagnostic Procedures Manual will direct the technician to determine if the vehicle evaporative system has an external system leak. Examples of some external system leaks are: a loose gas cap, a disconnected evaporative system hose, or a loose hose connection. Remember that the evaporative system may also have an internal system leak. This internal leak may be caused by an intermittent or permanently stuck open Duty Cycle Purge (DCP) valve. This leak source is considered to be internal because any escaping emissions enter into the engine system and not directly into the atmosphere, unlike an external leak. An internal leak may cause one of the above DTC's. Possible causes of a stuck open (intermittent or permanent) DCP valve are: 1. Corrosion due to system moisture or possible water intrusion into the system.

Scan Code:

P0455 (M)

DBR Scan Tool Display:

Evaporative Emission Control System Leak Detected (large leak)

Description of Diagnostic Trouble Code:

A large leak has been detected in the evaporative system. See TSB 25-001-02. Also, possible faulty or loose gas cap. Note: The respective Powertrain Diagnostic Procedures Manual will direct the technician to determine if the vehicle evaporative system has an external system leak. Examples of some external system leaks are: a loose gas cap, a disconnected evaporative system hose, or a loose hose connection. Remember that the evaporative system may also have an internal system leak. This internal leak may be caused by an intermittent or permanently stuck open Duty Cycle Purge (DCP) valve. This leak source is considered to be internal because any escaping emissions enter into the engine system and not directly into the atmosphere, unlike an external leak. An internal leak may cause one of the above DTC's. Possible causes of a stuck open (intermittent or permanent) DCP valve are: 1. Corrosion due to system moisture or possible water intrusion into the system.
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