P1602 — ECU/DME not properly coded to vehicle
BMW diagnostic code. Below: what it means, common causes, symptoms, and the exact bench-programming fix path.
Common causes
- •Donor DME installed without coding
- •Coding session aborted
- •VIN write failure
- •EWS/CAS pairing not completed
Symptoms you'll see
- •Crank-no-start
- •DME coding warnings
- •Multiple comm errors
The fix path
Identify era: EWS-era → EWS delete makes the donor DME run; CAS-era → CAS Key Programming re-pairs; FEM-era → FEM/BDC Key Programming.
AML services that fix this
Mail in the affected module, we bench-program, typically ship back next business day. Flat pricing, flat-rate return shipping at checkout.
BMW CAS Module Key Programming (2006-2012)
$150Lost every BMW key, or the car stopped recognizing the one you have? Ship your CAS module — we program a new working key. Covers CAS2, CAS3, CAS3+, CAS4, CAS4+ — on CAS3+ and CAS4+ ship the DME with the CAS, the new key's ISN is read from it.
Service detailsBMW FEM/BDC Key Programming
$150Lost the keys to your F-chassis BMW? Ship your FEM/BDC module AND DME — we program a new working key.
Service detailsBMW DME EWS Delete (MS41/42/43/45, MSS50-70)
$250Swapped DME cranking but never firing? Plug-and-play EWS delete for BMW M52/M54/S54/S62/S65 DMEs — ship your DME, get it back IMMO-off with the EWS check removed.
Service detailsBrand deep-dive
All BMW services + chassis coverage
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Related diagnostic codes
P1570Engine Start Blocked by ImmobilizerP0513Incorrect Immobilizer KeyFRM/FRM3 not detectedBMW FRM/FRM3 Footwell Module unresponsiveEWS-DME comm errorEWS module not authenticating with DMECAS-DME comm errorCAS module unable to authorize startBMW E46 cluster pixel lossBMW E38/E39/E46 instrument cluster pixel dropoutsNot sure which service applies?
Text us your year/make/model + which scanner caught the code — we'll tell you exactly which module to ship and which service to pick.