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P1847

2-3 Shift Solenoid Circuit High Voltage.

  • Saturn
  • Powertrain
  • Manufacturer code
  • Medium severity

How this code is built

P
SystemPowertrain
1
Defined byThe manufacturer
8
AreaTransmission
47
FaultThe specific fault in that area

What it means

P1847 on a Saturn means the transmission control module has detected a high voltage condition in the 2-3 shift solenoid circuit. The module saw a circuit voltage higher than expected for the commanded state of the solenoid, which points to an open circuit, a short to voltage or a faulty solenoid or driver. The exact solenoid location and wiring layout depend on the model and transmission fitted.

Symptoms

  • Malfunction indicator lamp on, and possibly a transmission warning lamp
  • Harsh, delayed or missing 2-3 upshift
  • Transmission stuck in one gear or in a limp-home mode
  • Poor fuel economy or flaring between gears
  • Gearbox not shifting correctly when hot or cold

Possible causes

  • Damaged wiring or open circuit between the transmission control module and the 2-3 shift solenoidlikely
  • Corroded, loose or contaminated connector at the transmission or control modulelikely
  • Faulty 2-3 shift solenoid with an open internal windinglikely
  • Wiring short to voltage in the harness or internal transmission harnesspossible
  • Fluid contamination or wear affecting the solenoid assembly or internal harnesspossible
  • Faulty transmission control module driver circuitrare

How to diagnose

  1. Read all stored codes and freeze frame data, noting when the fault set and whether other transmission codes are present
  2. Check the transmission fluid level and condition, looking for burnt smell, debris or discolouration
  3. Inspect the wiring and connectors between the control module and the transmission for chafing, corrosion, bent pins or water ingress
  4. Check battery condition and charging voltage, as low or unstable supply can cause misleading circuit faults
  5. Back-probe or test the solenoid circuit for supply voltage, ground and continuity against the manufacturer's wiring diagram for that model
  6. Measure the 2-3 shift solenoid resistance and compare it with the specification for that transmission
  7. Check the circuit for a short to voltage with the connectors disconnected
  8. Clear the code and road test, watching whether it returns and under what conditions

How to fix

  • Repair or replace damaged wiring and terminals in the solenoid circuit
  • Clean, secure or replace corroded or loose connectors
  • Replace the 2-3 shift solenoid or the solenoid assembly if resistance or operation is out of specification
  • Replace the internal transmission harness if it is found to be shorted or open
  • Service the transmission with correct fluid and filter if contamination is found
  • Repair or replace the transmission control module only after wiring and solenoid faults are ruled out

Can I keep driving?

Medium severity

The car can usually be driven short distances, but it may shift poorly or enter limp mode, and continued use risks extra transmission wear. Get it checked soon and avoid heavy loads or towing until repaired.

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

This code for other makes

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