GMC Yukon 2000–2006
Common on this vehicle:LeakSmoke or fireWarning light
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・P0420
Candidate cause (the documents say what to do)
Ground Ring Terminal: loose or misadjusted
3 of the records matching this search name this component as the cause.
How to tell
P0420P0430
What to do
- If the converter has failed with no apparent reason, inspect for a poor crimp at the circuit terminal on the engine bank with the concern.
- The grounds in question are those for the ignition system, fuel injector or the ECM.
- Inspect the ground for corrosion or damage at the ground terminal ring, fasteners and grounding surfaces.
- If no corrosion or damage is found, tighten the ground bolt to the proper torque.
In the records
- Wiring: repaired 3
See the evidence (1 technical documents, 3 records)
Manufacturer’s documents
- Premature Catalytic Converter Failures – Preliminary Information PIP5232A 2018-05-07
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.