GMC Yukon 2000–2006
Common on this vehicle:
issueIntake manifold gasket leak (cold idle misfire, lean codes)Remove
Possible causes
The documents say what to doOnly records name itThe size of a node, the width of a link and the numbers are records matching this search, not likelihoods.
FaultCrate・GMC Yukon 2000–2006・P0430
Candidate cause (the documents say what to do)
P0420 / P0430 on a new or just-replaced catalytic converter (break-in not completed)
An SES light may occur on low-mileage vehicles or vehicles that recently had the catalytic converter replaced.
DTCs P0420 and/or P0430 may be stored.
How to tell
P0420P0430Check engine / Service Engine Soon
What to do
- If the diagnostics still do not pass, perform SI diagnostics and repair as necessary.
- On a new/low mileage vehicle with these DTCs, use the Tech 2 to verify engine run time on the Engine Hour Meter in the IPC Data Display/Data 1 List.
- Finally, restart the engine and operate the vehicle at the conditions for running the DTC P0420/430 tests, and make sure the vehicle passes them.
- If this occurs, clear the DTCs and perform the drive cycle.
- Drive vehicle at sustained highway speed for 25 to 30 minutes.
- Drive cycle step: after the engine has been off for 1 minute, restart and resume highway speed for an additional 10 to 15 minutes.
In the records
No record states work done for this cause.
See the evidence (1 technical documents, 0 records)
Passages of the technical documents
GMC Yukon Models 2002 - 2018 All All V8 ALL
General Motors (published by NHTSA) 2019-03-06
A SES light may be experienced on low mileage vehicles, or vehicles that have recently had the catalytic converter replaced.
General Motors (published by NHTSA) 2019-03-06
Upon inspection, DTCs P0420 and/or P0430 may be stored.
General Motors (published by NHTSA) 2019-03-06
the catalytic converter may not have completed a thorough break-in cycle after replacement, possibly resulting in a false DTC P0420 and/or P0430.
General Motors (published by NHTSA) 2019-03-06
A cause or a result a complaint states is the owner’s view or what a dealer told them, not an established fact.
Put together by FaultCrate from public records and technical documents. The cause and the repair are for the workshop to decide with the vehicle in front of it. Counts are records, not failure rates.