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DTC codes / GM codes / P1853

P1853 · GMBrake Band Apply Solenoid High Voltage

P1853 on a GM vehicle means the transmission control module (TCM) has detected an abnormally high voltage on the brake band apply solenoid circuit, which is used to engage the intermediate brake band for certain gear ranges. The TCM monitors the solenoid's commanded state versus the actual voltage on the control circuit, and when the voltage exceeds the expected threshold for the commanded state, it sets this code and typically illuminates the check engine light or transmission warning lamp.

SystemPowertrain
Code typeGM specific
SeverityMedium
Fix difficultyIntermediate
AreaTransmission

Symptoms you may notice

  • Check engine light or transmission warning light illuminated on the instrument cluster
  • Harsh or delayed shifts, especially when engaging second or fourth gear where the brake band is applied
  • Transmission may slip or fail to engage certain gears, leading to a no-drive condition in some ranges
  • Transmission may default to a limp-home mode with reduced performance and fixed shift points
  • Often no symptoms besides the warning light, especially if the fault is intermittent or only affects a non-critical operating range

Common causes, most likely first

  1. Faulty brake band apply solenoid with an internal short or open winding causing high voltage feedback
  2. Damaged or chafed wiring harness between the TCM and the solenoid, shorting to voltage or crossing with another circuit
  3. Corroded or loose electrical connector at the solenoid or TCM, creating high resistance or intermittent voltage spikes
  4. Failed TCM driver circuit for the solenoid, outputting excessive voltage or failing to regulate properly
  5. Low or contaminated transmission fluid causing solenoid malfunction or erratic operation
  6. Internal transmission mechanical issue, such as a stuck brake band apply piston, indirectly affecting solenoid load and voltage

How to diagnose and fix it

  1. Inspect the transmission fluid level and condition; top off or replace fluid if contaminated or low
  2. Check the solenoid electrical connector and harness for corrosion, chafing, or loose pins; clean and repair as needed
  3. Measure resistance across the brake band apply solenoid terminals and compare to GM specifications; replace if out of range
  4. Backprobe the solenoid control circuit at the TCM and verify voltage with a multimeter while commanding the solenoid on and off with a scan tool
  5. Inspect the TCM connector for corrosion or damage and verify powers and grounds to the TCM are clean and tight
  6. If the circuit and solenoid test good, substitute a known-good TCM or reprogram the existing TCM per GM service procedures
  7. Clear the code and perform a road test with a scan tool to confirm the repair and ensure no pending codes return

Before you replace the brake band solenoid

  • A chafed wire in the transmission harness near the bell housing or under the battery tray is a common cause of high voltage on this circuit, and it often mimics a failed solenoid.
  • The TCM may set P1853 intermittently due to voltage spikes from a failing alternator or poor grounds, so always check charging system voltage and ground straps before condemning the solenoid.
  • On some GM transmissions, the brake band apply solenoid shares a power feed with other solenoids, so a short in a neighboring circuit can raise voltage on this line and set P1853 without any fault in the solenoid itself.
  • A stuck brake band apply piston or worn band can cause the solenoid to draw abnormal current and produce a high voltage code, so mechanical inspection is warranted if electrical tests pass.
  • After replacing the solenoid or TCM, a bidirectional scan tool is needed to clear the code and perform a transmission adaptive relearn; simply disconnecting the battery will not reset the TCM properly.

Can I keep driving with P1853?

You can usually drive the vehicle short distances to a repair shop, but avoid heavy acceleration or towing because the transmission may slip or fail to engage a gear unexpectedly. If the transmission enters limp-home mode or you notice harsh shifting, limit driving to essential trips and have the fault diagnosed promptly to prevent further transmission damage.

Tools that help

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Guidance is general and written for GM vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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