OBD Guide
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P1285

Cylinder Head Over Temperature Condition

P1285 is an OBD-II diagnostic trouble code meaning: Cylinder Head Over Temperature Condition. Common causes: low coolant level, thermostat malfunction. Estimated repair cost: $6–56.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–56 (est.)

Symptoms

  • Engine overheating
  • Reduced engine power
  • Steam from under the hood
  • Unstable engine operation
  • Check engine light comes on

Causes

  • Low coolant level
  • Thermostat malfunction
  • Clogged radiator
  • Water pump malfunction
  • Problems with the head temperature sensor

How to Fix

  1. Check coolant level
  2. Check thermostat operation
  3. Clean or replace the radiator
  4. Check the functionality of the water pump
  5. Check the head temperature sensor

Related codes

P1286P1287P1288

Error P1285 by Vehicle Brand

BMWBuickCadillacChevroletChryslerDodgeFordGMGMCJeepLincolnMercuryOldsmobilePlymouthPontiacSaturnVolkswagen

FAQ

What does the P1285 code mean?

P1285 is an OBD-II diagnostic trouble code that indicates: Cylinder Head Over Temperature Condition

What causes a P1285 error code?

The most common causes of P1285 include: Low coolant level; Thermostat malfunction; Clogged radiator; Water pump malfunction.

How do I fix a P1285 diagnostic trouble code?

To fix P1285: Check coolant level. Check thermostat operation. Clean or replace the radiator. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1285?

Do not drive — repair immediately

How much does it cost to fix P1285?

The estimated repair cost for P1285 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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