OBD Guide
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P1635

Tire / Axle Ratio Out of Acceptable Range

P1635 is an OBD-II diagnostic trouble code meaning: Tire / Axle Ratio Out of Acceptable Range. Common causes: installation of tires of different sizes, wheel speed sensor malfunction. Estimated repair cost: $17–56.

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

Symptoms

  • Check Engine light comes on
  • Incorrect speedometer readings
  • Problems with cruise control
  • Unstable operation of the ABS system
  • Decreased fuel efficiency

Causes

  • Installation of tires of different sizes
  • Wheel speed sensor malfunction
  • Transmission Output Speed Sensor Problems
  • Differential fault
  • Problems with the sensor wiring harness

How to Fix

  1. Check all tire sizes and specifications
  2. Diagnose wheel speed sensors
  3. Check transmission output speed sensor
  4. Inspect the wiring harness for damage
  5. Reset error and test drive

Related codes

P1630P1636P1637

Error P1635 by Vehicle Brand

BMWBuickCadillacChevroletFordGMGMCLincolnMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1635 code mean?

P1635 is an OBD-II diagnostic trouble code that indicates: Tire / Axle Ratio Out of Acceptable Range

What causes a P1635 error code?

The most common causes of P1635 include: Installation of tires of different sizes; Wheel speed sensor malfunction; Transmission Output Speed Sensor Problems; Differential fault.

How do I fix a P1635 diagnostic trouble code?

To fix P1635: Check all tire sizes and specifications. Diagnose wheel speed sensors. Check transmission output speed sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1635?

Yes, but get it checked soon

How much does it cost to fix P1635?

The estimated repair cost for P1635 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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