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Trouble code
P0174: possible causes and documented repairs — 2000–2006 GMC Yukon
Of the records of the 2000–2006 GMC Yukon, 7 state trouble code P0174 (Manufacturer communication: 7). The technical documents say how to deal with 1 of its possible causes. They are listed by the number of matching records, most first.
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Causes the technical documents say how to deal with (1)
Intake manifold gasket leak (cold idle misfire, lean codes)
No matching record (stated by the technical documents)
The bulletin describes a cold engine idle misfire with DTCs P0171, P0174 or P0300.
The bulletin states the intake gasket seals may leak around the intake ports, causing the lean condition.
How to tell
What to do
- The seals may leak around the bottom side of the port, which makes the vacuum leak hard to detect.
- Lower-than-normal MAF readings may be seen if the intake seals are leaking.
- An intake manifold with warpage in excess of 3mm (.118 in.) over a 200mm (7.87-in.) area must be replaced.
- Measure the intake manifold for warpage across two runner ports only.
5 more steps ·All steps, part numbers and sources (3 sources) →
Related symptoms, trouble codes and warning displays
What the technical documents state together with the faults above.
- Symptom
- Warning light
- Warning display
- Check engine / Service Engine Soon
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.