OBD Guide

P17E8

Ratio Monitoring Shift 3-4

P17E8 is an OBD-II diagnostic trouble code meaning: Ratio Monitoring Shift 3-4. Common causes: low transmission fluid level, worn friction discs. Estimated repair cost: $17–278.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–278 (est.)

Symptoms

  • Incorrect gear shifting
  • Slipping when shifting 3-4
  • Hard gear shifting
  • Deterioration in acceleration dynamics
  • Transmission fluid overheating

Causes

  • Low transmission fluid level
  • Worn friction discs
  • Shift solenoids malfunction
  • Problems with the valve body
  • Malfunction of speed sensors

How to Fix

  1. Check the level and condition of the transmission fluid
  2. Diagnose the operation of switching solenoids
  3. Check input/output shaft speed sensors
  4. Perform gearbox adaptation
  5. If necessary, repair the mechanical part of the automatic transmission

Related codes

FAQ

What does the P17E8 code mean?

P17E8 is an OBD-II diagnostic trouble code that indicates: Ratio Monitoring Shift 3-4

What causes a P17E8 error code?

The most common causes of P17E8 include: Low transmission fluid level; Worn friction discs; Shift solenoids malfunction; Problems with the valve body.

How do I fix a P17E8 diagnostic trouble code?

To fix P17E8: Check the level and condition of the transmission fluid. Diagnose the operation of switching solenoids. Check input/output shaft speed sensors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P17E8?

Limited driving only, diagnose soon

How much does it cost to fix P17E8?

The estimated repair cost for P17E8 is $17–278. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat