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2014 PORSCHE PANAMERA GTS
4.8L V8•AWD•DCT•gas•M48.70
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor487Torque2173Fluid10DTC1839Battery1Maintenance0Recalls3
P1136moderate severityPowertrain

Long Term Fuel Trim System Too Rich Bank 2

on 2014 Porsche Panamera GTS 4.8L V8 · AWD

What this code means

The ECU detected that the long-term fuel trim for Bank 2 has exceeded the maximum rich correction limit. The adaptive fuel system has exhausted its ability to lean out the mixture on Bank 2.

Symptoms

  • Check Engine Light
  • Rich exhaust from Bank 2
  • Poor fuel economy
  • Rough idle
  • Black smoke

Common causes

  • Leaking fuel injectors Bank 2
  • O2 sensor Bank 2 faulty
  • Fuel pressure too high
  • PCV system fault
  • Coolant temp sensor issue

Diagnostic steps

  1. Compare fuel trims Bank 1 vs Bank 2
  2. Test O2 sensor Bank 2
  3. Check fuel pressure
  4. Inspect PCV system
  5. Test coolant temperature sensor

Repair notes

Repair the cause of excess fuel delivery on Bank 2.

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