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P1218 GMC Code - Injection Pump Calibration Circuit

- Code Popularity: 6,464 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1218 GMC?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Powertrain Control Module (PCM) currently does not have a resistor value
  • Powertrain Control Module (PCM) is unable to read resistor value
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How to Fix the DTC P1218 GMC?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

The P1218 code usually sets when the resistor is missing out of the PMD or the system has been disturbed and the ECU is re-learning the resistor value. Most of the times the problem is the missing resistor. Cycling the key many times will relearn the resistor value.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1218 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P1218 GMC Description

The Powertrain Control Module (PCM) uses a calibrated resistor internally in the Injection Pump to determine fuel rates. the resistor value is stored in the PCM memory. If the PCM memory has been disturbed or replaced the PCM will relearn the resistor value on the next ignition cycle. The code is set when the key ON or engine running and PCM does not detects a correct current valid resistor value, or it determined that it was unable to read the current resistor value.

OBDII Code P1218 GMC - Injection Pump Calibration Circuit - AutoCodes.com
P1218 GMC Code - Injection Pump Calibration Circuit

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Code P1218 GMC comments

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