Poor connection or corrosion at the transmission harness connector or solenoid pack connector; Wiring damage, chafing or high resistance in the solenoid power supply circuit; Blown fuse or faulty relay in the transmission power feed; Weak battery, poor battery terminals or charging system fault causing low system voltage; Poor earth connection to the transmission control module or engine/body earth point; Internal fault in the solenoid pack or internal wiring loom in the gearbox; Faulty transmission control module.

P1833

A/T Solenoids Power Circuit Low Voltage.

Saturn
Powertrain
Manufacturer code
Medium severity

How this code is built

P: SystemPowertrain
1: Defined byThe manufacturer
8: AreaTransmission
33: FaultThe specific fault in that area

What it means

P1833 on a Saturn means the transmission control module has detected low voltage on the supply circuit that powers the automatic transmission solenoids. The module expects near battery voltage at the solenoid power feed when the ignition is on or the engine is running, and it saw a lower value than expected, so it set the code.

Symptoms

Gearbox warning light or malfunction indicator lamp on
Transmission stuck in one gear (limp-home mode)
Harsh, delayed or absent gear changes
No torque converter lock-up or poor fuel economy
Gearbox not shifting at all or selecting gears erratically

Possible causes

Poor connection or corrosion at the transmission harness connector or solenoid pack connectorlikely
Wiring damage, chafing or high resistance in the solenoid power supply circuitlikely
Blown fuse or faulty relay in the transmission power feedpossible
Weak battery, poor battery terminals or charging system fault causing low system voltagepossible
Poor earth connection to the transmission control module or engine/body earth pointpossible
Internal fault in the solenoid pack or internal wiring loom in the gearboxrare
Faulty transmission control modulerare

How to diagnose

Read all stored codes and freeze frame data, noting battery voltage, gear selected and whether other electrical or charging codes are present.
Test battery state of charge and charging voltage with the engine running, and check the battery terminals for tightness and corrosion.
Check the fuses and relays that feed the transmission control and solenoid circuit, using the wiring diagram for the specific model and gearbox.
Inspect the transmission harness and connectors for chafing, oil contamination, corrosion, bent pins or water ingress.
With the ignition on, measure voltage at the solenoid power feed pin and compare it with battery voltage, then perform a voltage drop test on the feed and earth sides while the circuit is loaded.
Check the earth points for the transmission control module and gearbox for cleanliness and tightness.
Check resistance of the solenoids and the internal gearbox harness against the manufacturer's specification for that gearbox.
Clear the code and road test while monitoring the supply voltage to see whether it returns and under what conditions.

How to fix

Clean and secure or replace corroded or loose connectors and terminals on the transmission harness.
Repair or replace damaged wiring in the solenoid supply circuit, using proper soldered or crimped and sealed repairs.
Replace the blown fuse or faulty relay after finding out why it failed.
Replace a weak battery and repair any charging system fault or poor battery connection.
Clean and tighten or repair the relevant earth connections.
Replace the solenoid pack or internal harness if testing proves it faulty, and only replace the control module once supply and earths are proven good.

Can I keep driving?

Medium severity

The car may go into limp-home mode with limited gears, so drive gently and only as far as needed to get it checked. Continued driving with erratic shifting can cause extra wear in the gearbox, so get it diagnosed soon.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.