Transmission Control Module System Voltage Excessively Low
Table of contents
P1DB1 JEEP Possible Causes
- Open fuse
- Low battery voltage
- Engine charging system
- Faulty Transmission Control Module (TCM)
How do I fix code P1DB1 JEEP?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1DB1 JEEP code
The cost of diagnosing the P1DB1 JEEP code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1DB1 JEEP Description
The Transmission Control Module (TCM) monitors the system voltage level at the TCM supply voltage terminal for the following failure conditions:
– System Voltage Excessively Low
– System Voltage Low
– System Voltage High
If the TCM supply voltage is below a threshold that is lower than the System Voltage Excessively Low threshold, the TCM will not supply power to the solenoid valves and pressure regulators. A Diagnostic Trouble Code (DTC) is set when one of the diagnostic voltage thresholds is reached for a calibrated amount of time.