P1595
Speed Control Solenoid Circuit Open Or Shorted.
- Dodge
- Powertrain
- Manufacturer code
- Low severity
How this code is built
- P
- SystemPowertrain
- 1
- Defined byThe manufacturer
- 5
- AreaVehicle speed, idle control and auxiliary inputs
- 95
- FaultThe specific fault in that area
What it means
P1595 on a Dodge means the powertrain control module has found an open or shorted circuit in the speed control (cruise control) solenoid circuit. The module checks the vent/vacuum solenoid driver circuits and sets the code when the current or voltage does not match what it expects for the commanded state. Cruise control is usually disabled while the fault is present.
Symptoms
- Cruise control will not engage or drops out
- Check engine light on
- Cruise control switch lights or indicators behave oddly
- No other change in engine running or drivability in most cases
- Cruise control works intermittently, especially over bumps or when wiring moves
Possible causes
- Damaged, chafed or corroded wiring in the speed control solenoid circuit (open circuit or short to ground or voltage)likely
- Loose, corroded or pushed-out pins in the solenoid or PCM connectorlikely
- Faulty speed control servo or vacuum/vent solenoid assembly, depending on the model and enginepossible
- Open or shorted vacuum solenoid coil inside the servo unitpossible
- Blown fuse or loss of supply feed to the speed control circuitpossible
- Faulty powertrain control module driverrare
How to diagnose
- Read all stored and pending codes and note the freeze frame data; check for other speed control or brake switch codes
- Visually inspect the speed control servo or solenoid, its connector and the wiring run for chafing, heat damage, water ingress and corrosion
- Check the relevant fuses and the supply feed to the solenoid against the wiring diagram for the specific model and year
- Disconnect the solenoid and measure its coil resistance, comparing it with the manufacturer's specification
- Check the solenoid control wire for continuity back to the PCM, and test for short to ground and short to voltage with the connectors disconnected
- Inspect the PCM connector terminals for spread, corroded or backed-out pins
- Clear the code and test drive, watching whether the code returns and under what conditions (cold, wet, bumpy road)
- If wiring and solenoid test good, check for a PCM driver fault only after confirming the circuit is sound and any applicable software updates
How to fix
- Repair or replace damaged wiring, and secure it away from sharp edges and heat
- Clean or replace corroded or loose connector terminals
- Replace the speed control servo or solenoid assembly if its resistance or operation is out of specification
- Replace the blown fuse after finding and fixing the cause of the overload
- Replace or repair the PCM only when all other causes are ruled out and the driver fault is confirmed
Can I keep driving?
Low severity
The car is normally safe to drive, but cruise control will probably not work. Book it in for repair at a convenient time.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.