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Pending code P1637 cranks will not start

Tiny
JLGLZ
  • MEMBER
  • 2003 BMW 745
  • 4.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
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.
Wednesday, November 15th, 2017 AT 8:17 PM

2 Replies

Tiny
STEVE W.
  • MECHANIC
  • 12,972 POSTS
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.
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Friday, February 12th, 2021 AT 10:16 AM
Tiny
F4I_GUY
  • MECHANIC
  • 3,302 POSTS
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.
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Friday, February 12th, 2021 AT 10:16 AM

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