Back to 2000 BMW 528i
Help
2000 BMW 528I
2.8L I6 M52•RWD•AUTOMATIC•gas
1 active safety recall on this vehicle — view recalls
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor498Torque3165Fluid8DTC873Battery1Maintenance0Recalls1
29E1moderate severityPowertrain

Lambda Additive/Idle Adaptation Limit, Bank 2

on 2000 BMW 528i 2.8L I6 M52 · RWD

What this code means

The long-term fuel trim at idle/additive range has reached its correction limit on bank 2, indicating a lean or rich mixture (OBD P0173). The ECU cannot correct the air/fuel imbalance further.

Symptoms

  • Rough idle
  • Check engine light
  • Poor fuel economy

Common causes

  • Vacuum/intake air leak
  • Faulty MAF sensor
  • Leaking or dirty fuel injectors
  • Faulty oxygen sensor

Diagnostic steps

  1. Read fuel trim values with scan tool
  2. Smoke test intake for leaks
  3. Inspect MAF sensor readings
  4. Check fuel pressure and injectors
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Other Powertrain codes on this vehicle

🔌 Need this data in your app? It's all in the free API →
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
Share:XRedditFBWhatsAppThreadsEmail
⚠ STILL BEHIND THE PAYWALL
The 2000 BMW 528i repair data is incomplete because no one has sponsored it yet. For $99, we generate the full step-by-step procedures, then fact-check them with a second AI pass and your expert review. Your name on every procedure, permanently.
The same data would cost $169/mo from Mitchell1 or $30/year from ALLDATAdiy — and you'd be renting access, not freeing it. Sponsor once, free forever.
Sponsor the BMW 528i — $99 →
Building an app?
Free API access to all this data — 10 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →