Engine-Codes - Generic - P1289

P1289 - Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P1289 Possible Causes

  • Wrong thermostat
  • Engine overheated
  • Low engine coolant level
  • Faulty Cylinder Head Temperature (CHT) sensor
  • Cylinder Head Temperature (CHT) sensor harness is open or shorted
  • Cylinder Head Temperature (CHT) sensor circuit poor electrical connection

How do I fix code P1289?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P1289 code

Labor: 1.0

The cost of diagnosing the P1289 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1289 Meaning

The Cylinder Head Temperature (CHT) Sensor is mounted into the wall of the cylinder head and is not connected to any coolant passages. The CHT sends a signal to the Powertrain Control Module (PCM) indicating the cylinder head temperature. If the temperature exceeds 126°C (-258°F), the PCM disables four fuel injectors at a time. The PCM will alternate which four injectors are disabled every 32 engine cycles. The four cylinders that are not being fuel injected act as air pumps to aid in cooling the engine. If the temperature exceeds 154 °C (310°F), the PCM disables all of the fuel injectors until the engine temperature drops below 154°C (310°F).

P1289 More Information

Need more information on how to fix the P1289 code?
Get Access to Factory Service Manuals

Information for specific makes

  • P1289 ACURA Engine Oil Pressure Sensor Stuck High
  • P1289 AUDI Turbocharger Bypass Valve Short To Ground
  • P1289 BMW Switching Solenoid for Air Assisted Injection Valves Bank 2 Control Circuit Signal High
  • P1289 CHRYSLER Manifold Tune Valve Circuit Condition
  • P1289 DODGE Manifold Tune Valve Circuit Condition
  • P1289 FORD Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range
  • P1289 HONDA Engine Oil Pressure Sensor Stuck High
  • P1289 INFINITI Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2
  • P1289 LINCOLN Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range
  • P1289 MAZDA Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range
  • P1289 MERCURY Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range
  • P1289 MINI Switching Solenoid for Air Assisted Injection Valves Bank 2 Control Circuit Signal High
  • P1289 NISSAN Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2
  • P1289 VOLKSWAGEN Turbocharger Bypass Valve Short To Ground

Need more help?

Get the P1289 code diagnosed by a professional: Find a repair shop in your area