Pending code P1637 cranks will not start

2003 BMW 745
140,000 MILES • 4.4L • V8 • 2WD • AUTOMATIC
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JLGLZ
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  • 9 POSTS
Car cranks but will not start. only code I get is a pending code p1637.
One day I turned car off and since then I cannot turn car on, it just cranks but will not start. I have no codes on reader.
Nov 15, 2017 at 8:17 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
P1637 - Throttle Valve Position Control, Control deviation from expected. Check the battery voltage and the connection at the throttle position sensor. If the PCM cannot tell the throttle position it will not start.
Feb 12, 2021 at 10:16 AM
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F4I_GUY
  • ✓ASE Certified Mechanic
  • 3,302 POSTS
  • ASE Certified Mechanic
On E65 (your chassis code) you typically get this fault due to DME water ingress. The DME is the vehicles engine computer (not PCM or ECU/ECM). Remove the DME main connectors and inspect all the pins and terminals, there should be some green corrosion inside. Hopefully it has not internally damaged the module. Clean out the corrosion and re-test.
Feb 12, 2021 at 10:16 AM
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