OBD Guide

P0898

Transmission Control System MIL Request Circuit Low

P0898 is an OBD-II diagnostic trouble code meaning: Transmission Control System MIL Request Circuit Low. Common causes: open or short circuit in mil request circuit, poor contact in tcm or ecm connectors. Estimated repair cost: $6–33.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–33 (est.)

Symptoms

  • Malfunction indicator lamp (MIL) does not come on when there is a problem
  • Gear shifting problems
  • Check engine light comes on
  • Reduced transmission performance
  • Possible errors in other systems

Causes

  • Open or short circuit in MIL request circuit
  • Poor contact in TCM or ECM connectors
  • Transmission control module (TCM) malfunction
  • Engine control module (ECM) malfunction
  • Wiring harness damage

How to Fix

  1. Check the continuity of wires in the MIL request circuit
  2. Check contacts in TCM and ECM connectors
  3. Check MIL Request Circuit Voltage
  4. Perform TCM and ECM diagnostics
  5. Replace damaged wires or connectors

Related codes

Error P0898 by Vehicle Brand

FAQ

What does the P0898 code mean?

P0898 is an OBD-II diagnostic trouble code that indicates: Transmission Control System MIL Request Circuit Low

What causes a P0898 error code?

The most common causes of P0898 include: Open or short circuit in MIL request circuit; Poor contact in TCM or ECM connectors; Transmission control module (TCM) malfunction; Engine control module (ECM) malfunction.

How do I fix a P0898 diagnostic trouble code?

To fix P0898: Check the continuity of wires in the MIL request circuit. Check contacts in TCM and ECM connectors. Check MIL Request Circuit Voltage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0898?

Yes, but get it checked soon

How much does it cost to fix P0898?

The estimated repair cost for P0898 is $6–33. Actual cost depends on your vehicle, location, and labor rates.

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