Saab P1640: Main Relay Circuit No Voltage to Control Module

Is your scanner showing Saab P1640?
No worries. We'll show you what it means and how to deal with it.

Presented by
OBDCodex, Editor

Saab P1640: Main Relay Circuit No Voltage to Control Module

DIY Difficulty Level
Repair Cost
Can I Still Drive?
Yes (Short-term only)

What Does The Saab P1640 Code Mean?

Control module detects no voltage.

What Are The Potential Causes Of The Saab P1640 Code?

  • Check input signal for Control module
  • Check for poor contact in Control module connector
  • Check harness between relay and Control module
  • Faulty Control module

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> Saab PCM ECM ECU Engine Control Module Computer Saab ECM Repair

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

Technical Service Bulletin PIP5094 for P1640

Tagged :
You know someone would like this

Leave a comment

Your email address will not be published. Required fields are marked *