OBD Guide
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C1048

Left Rear Wheel Pressure Phase Monitoring

C1048 is an OBD-II diagnostic trouble code meaning: Left Rear Wheel Pressure Phase Monitoring. Common causes: wheel pressure sensor malfunction, problems with the wiring harness to the sensor. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • ABS or ESP indicator is on
  • Uneven braking
  • Reduced brake efficiency
  • Activation of the stabilization system for no reason

Causes

  • Wheel pressure sensor malfunction
  • Problems with the wiring harness to the sensor
  • ABS module malfunction
  • Sensor is dirty or damaged
  • Problems with the brake circuit

How to Fix

  1. Diagnostics of the ABS/ESP system
  2. Checking connections and wiring harness
  3. Pressure sensor testing
  4. Replacing a faulty sensor if necessary
  5. Checking and bleeding the brake system

Related codes

C1046C1047C1049C1050

FAQ

What does the C1048 code mean?

C1048 is an OBD-II diagnostic trouble code that indicates: Left Rear Wheel Pressure Phase Monitoring

What causes a C1048 error code?

The most common causes of C1048 include: Wheel pressure sensor malfunction; Problems with the wiring harness to the sensor; ABS module malfunction; Sensor is dirty or damaged.

How do I fix a C1048 diagnostic trouble code?

To fix C1048: Diagnostics of the ABS/ESP system. Checking connections and wiring harness. Pressure sensor testing. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1048?

Do not drive — repair immediately

How much does it cost to fix C1048?

The estimated repair cost for C1048 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat