Poor connection or corrosion at the transmission harness connector or internal case connector; Open circuit or high resistance in the solenoid power supply wiring, including chafed or damaged harness sections; Blown fuse or faulty relay or ignition-fed supply to the transmission control module or solenoids; Weak battery, poor battery terminals or a charging system fault causing low system voltage; Poor earth connection for the transmission control module or transmission; Shorted or internally faulty solenoid pulling the supply voltage down; Faulty transmission control module driver or supply circuit.

P1833

A/T Solenoids Power Circuit Low Voltage.

Oldsmobile
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 an Oldsmobile means the transmission control module has seen low voltage on the supply feeding the automatic transmission solenoids. The module monitors this feed and sets the code when the voltage drops below its expected threshold while the ignition is on or the engine is running. The fault is in the supply circuit, not necessarily in the solenoids themselves.

Symptoms

Transmission warning light or check engine light on
Transmission stuck in one gear (limp-home mode)
Harsh, delayed or missing gear shifts
No torque converter clutch lock-up
Poor fuel economy
Intermittent shifting faults that come and go with electrical load

Possible causes

Poor connection or corrosion at the transmission harness connector or internal case connectorlikely
Open circuit or high resistance in the solenoid power supply wiring, including chafed or damaged harness sectionslikely
Blown fuse or faulty relay or ignition-fed supply to the transmission control module or solenoidspossible
Weak battery, poor battery terminals or a charging system fault causing low system voltagepossible
Poor earth connection for the transmission control module or transmissionpossible
Shorted or internally faulty solenoid pulling the supply voltage downrare
Faulty transmission control module driver or supply circuitrare

How to diagnose

Read all stored codes and freeze frame data, noting battery voltage and whether the fault is current or historic, and check for other voltage or charging codes
Test battery condition and charging voltage at the battery with the engine running, and inspect the terminals for tightness and corrosion
Check the fuses and relays that supply the transmission control module and solenoids, using the wiring diagram for the specific model and year
Inspect the transmission harness, external connector and control module connectors for corrosion, bent pins, water ingress and chafing
With the ignition on, measure voltage at the solenoid supply pin and compare it with battery voltage; a voltage drop test under load will show high resistance
Check the module and transmission earth points for resistance and security
Wiggle test the harness while monitoring supply voltage to find intermittent faults
Measure solenoid resistances against the specification for the particular transmission, as this varies by model

How to fix

Clean, repair or replace corroded or damaged connectors and terminals
Repair or replace damaged wiring in the solenoid supply circuit
Replace the faulty fuse or relay after finding why it failed
Replace a weak battery and repair the charging system if voltage is low
Clean and tighten earth connections, repairing any damaged earth leads
Replace a faulty solenoid or solenoid pack, or the control module, only once testing confirms it is at fault

Can I keep driving?

Medium severity

The car can usually be driven short distances, but expect limp-home mode and rough shifting. Have it checked soon, as continued driving with poor shifting or low supply voltage can cause extra transmission wear or leave you stranded.

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