OBD Guide
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P1536

Engine Coolant Overtemperature Air Conditioning Disabled

P1536 is an OBD-II diagnostic trouble code meaning: Engine Coolant Overtemperature Air Conditioning Disabled. Common causes: low coolant level, thermostat malfunction. Estimated repair cost: $6–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–167 (est.)

Symptoms

  • Turning off the air conditioning while driving
  • Increased engine temperature
  • Hot air from deflectors
  • Possible fan activation at high speed
  • Overheat warning on instrument panel

Causes

  • Low coolant level
  • Thermostat malfunction
  • Radiator clogged
  • Water pump malfunction
  • Cooling fan problems

How to Fix

  1. Check the level and condition of the coolant
  2. Diagnose thermostat operation
  3. Clean the radiator from dirt
  4. Check the functionality of the water pump
  5. Test the cooling fan and its circuits

Related codes

P0128P1299P0217

Error P1536 by Vehicle Brand

BuickCadillacChevroletChryslerFordGMGMCLincolnMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1536 code mean?

P1536 is an OBD-II diagnostic trouble code that indicates: Engine Coolant Overtemperature Air Conditioning Disabled

What causes a P1536 error code?

The most common causes of P1536 include: Low coolant level; Thermostat malfunction; Radiator clogged; Water pump malfunction.

How do I fix a P1536 diagnostic trouble code?

To fix P1536: Check the level and condition of the coolant. Diagnose thermostat operation. Clean the radiator from dirt. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1536?

Do not drive — repair immediately

How much does it cost to fix P1536?

The estimated repair cost for P1536 is $6–167. Actual cost depends on your vehicle, location, and labor rates.

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