OBD Guide
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B2772

PTC Heater Voltage

B2772 is an OBD-II diagnostic trouble code meaning: PTC Heater Voltage. Common causes: open or short circuit in ptc heater wiring harness, ptc heater malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Reduced interior heating efficiency
  • Unstable operation of the climate control system
  • Check Engine Light Illuminates

Causes

  • Open or short circuit in PTC heater wiring harness
  • PTC heater malfunction
  • Problems with the heater circuit relay or fuse
  • Climate control unit error

How to Fix

  1. Check the condition of fuses and relays associated with the PTC heater
  2. Inspect the wiring harness for damage or corrosion.
  3. Check PTC heater resistance with a multimeter
  4. Replace PTC heater or damaged circuit components as necessary
  5. Reset the error and check if it returns

Related codes

B2771B2773B2774

FAQ

What does the B2772 code mean?

B2772 is an OBD-II diagnostic trouble code that indicates: PTC Heater Voltage

What causes a B2772 error code?

The most common causes of B2772 include: Open or short circuit in PTC heater wiring harness; PTC heater malfunction; Problems with the heater circuit relay or fuse; Climate control unit error.

How do I fix a B2772 diagnostic trouble code?

To fix B2772: Check the condition of fuses and relays associated with the PTC heater. Inspect the wiring harness for damage or corrosion.. Check PTC heater resistance with a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2772?

Limited driving only, diagnose soon

How much does it cost to fix B2772?

The estimated repair cost for B2772 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat