OBD Guide
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P1850

Brake Band Apply Solenoid Circuit

P1850 is an OBD-II diagnostic trouble code meaning: Brake Band Apply Solenoid Circuit. Common causes: open or short circuit in solenoid circuit, brake band solenoid malfunction. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Incorrect gear shifting
  • Hard shifts
  • Transmission gets stuck in one gear
  • Check Engine light comes on
  • Reduced transmission efficiency

Causes

  • Open or short circuit in solenoid circuit
  • Brake band solenoid malfunction
  • Wiring Harness Problems
  • Malfunction of the transmission control unit
  • Poor contact in connectors

How to Fix

  1. Check the continuity of the solenoid circuit
  2. Check solenoid resistance
  3. Inspect the wiring harness for damage
  4. Check contacts in connectors
  5. Replace solenoid if necessary

Related codes

P1851P1852P1853

Error P1850 by Vehicle Brand

BuickCadillacChevroletFordGMGMCLincolnMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1850 code mean?

P1850 is an OBD-II diagnostic trouble code that indicates: Brake Band Apply Solenoid Circuit

What causes a P1850 error code?

The most common causes of P1850 include: Open or short circuit in solenoid circuit; Brake band solenoid malfunction; Wiring Harness Problems; Malfunction of the transmission control unit.

How do I fix a P1850 diagnostic trouble code?

To fix P1850: Check the continuity of the solenoid circuit. Check solenoid resistance. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1850?

Yes, but get it checked soon

How much does it cost to fix P1850?

The estimated repair cost for P1850 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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