OBD Guide
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C1242

Pump Motor Circuit Open

C1242 is an OBD-II diagnostic trouble code meaning: Pump Motor Circuit Open. Common causes: broken or damaged wires to the abs pump, abs pump relay malfunction. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • The ABS indicator on the dashboard is on
  • ABS system does not work
  • Possible problems with the ESP system
  • When I try to activate the ABS, I hear a clicking sound, but the pump does not turn on.

Causes

  • Broken or damaged wires to the ABS pump
  • ABS pump relay malfunction
  • Poor contact in pump or relay connectors
  • ABS pump motor failure
  • Problems with the ABS control unit

How to Fix

  1. Check ABS pump circuit fuse
  2. Inspect the ABS pump wiring and connectors for damage.
  3. Check the operation of the ABS pump relay
  4. Measure the resistance of the pump motor windings
  5. Check the presence of power and ground on the pump when the ignition is turned on.
  6. If necessary, replace the ABS pump or relay

Related codes

C1241C1243C1244

FAQ

What does the C1242 code mean?

C1242 is an OBD-II diagnostic trouble code that indicates: Pump Motor Circuit Open

What causes a C1242 error code?

The most common causes of C1242 include: Broken or damaged wires to the ABS pump; ABS pump relay malfunction; Poor contact in pump or relay connectors; ABS pump motor failure.

How do I fix a C1242 diagnostic trouble code?

To fix C1242: Check ABS pump circuit fuse. Inspect the ABS pump wiring and connectors for damage.. Check the operation of the ABS pump relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1242?

Limited driving only, diagnose soon

How much does it cost to fix C1242?

The estimated repair cost for C1242 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat