Engine-Codes - Generic - P1291

P1291 Code - No Temperature Rise Seen From Intake Air Heater

- Code Popularity: 28,350 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1291?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Air heater relay fault
  • Battery cable condition
  • Electrical circuit fault
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How to Fix the DTC P1291?

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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1291 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the P1291 Code Mean?

Temperature rise from intake air heaters is monitored for first 15 seconds of engine operation. The P1291 code may be stored if initial Intake Air Temperature (IAT) sensor reading is 0-66°F (-17.8 to 18.8°C), Battery Temperature Sensor (BTS) and Intake Air Temperature (IAT) sensor are within 10°F of each other, time between end of preheat and engine run state is less than 30 seconds, engine is cranked for less than 5 seconds before engine starts, preheat is completed before engine starts, post-heat is active and no IAT sensor or intake air heater relay DTCs exist.

P1291 Code - No Temperature Rise Seen From Intake Air Heater

Need more Information on the Code?

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Code P1291 Information for Specific Makes

  • P1291 Audi Engine Coolant Temperature Sensor High Input
  • P1291 Chrysler No Temperature Rise Seen From Intake Air Heater
  • P1291 Dodge No Temperature Rise Seen From Intake Air Heater
  • P1291 Ford Injector High Side Short To Ground Or Battery Voltage Bank 1
  • P1291 Volkswagen Engine Coolant Temperature Sensor High Input

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