Cadillac P1520: Transmission Range Switch Circuit Malfunction
Is your scanner showing Cadillac P1520?
No worries. We'll show you what it means and how to deal with it.
Cadillac P1520: Transmission Range Switch Circuit Malfunction
OVERVIEWWhat Does The Cadillac P1520 Code Mean?
DTC P0502 or P0503 not set, Engine started; and the PCM detected the Transaxle Range (TR) switch indicated an illegal combination, or with DTC P1810 diagnostic passed and the engine running, that the TR switch signal did not match the correct signal combi
What Are The Potential Causes Of The Cadillac P1520 Code?
- One or more TR switch circuits is open or shorted to ground
- One or more TR switch circuits is shorted to VREF or B+
- One or more TR switch circuits is shorted together
- TR switch is out of adjustment, damaged or it has failed
- PCM has failed
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> GM Genuine Parts 29542692 Automatic Transmission Range Select Lever Position Switch
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> GM Genuine Parts 12633238 Engine Control Module
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
