Chevrolet P1634: Improper Ignition 1 Signal Voltage
Is your scanner showing Chevrolet P1634?
No worries. We'll show you what it means and how to deal with it.
Chevrolet P1634: Improper Ignition 1 Signal VoltageOVERVIEW
What Does The Chevrolet P1634 Code Mean?
There is no Class II serial data circuit condition.
What Are The Potential Causes Of The Chevrolet P1634 Code?
- Faulty Ignition Control Module (ICM)
- Faulty Ignition 1 Power
- Ignition 1 Power harness is open or shorted
- Ignition 1 Power circuit poor electrical connection
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
GM, 2013, Service Bullettin – Prior To Any Circuit Testing.