Engine-Codes - Generic - P1003

P1003 Code - Fuel Composition Signals Message Counter Incorrect

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|P1003 code possible causes

  • Faulty Fuel Composition Sensor
  • Fuel Composition Sensor harness is open or shorted
  • Fuel Composition Sensor circuit poor electrical connection

|How is the P1003 code repair?

Start by checking 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.

|What is the cost to diagnose the P1003 code

Labor: 1.0

The cost to diagnose the P1003 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are P1003 code possible symptoms?

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

|What is P1003 code meaning?

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Fuel Composition Signals Message Counter Incorrect.

|Need more information with the P1003 code?

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|P1003 code information for specific makes

  • P1003 BUICK Fuel Composition Signals Message Counter Incorrect
  • P1003 CADILLAC Fuel Composition Signals Message Counter Incorrect
  • P1003 CHEVROLET Fuel Composition Signals Message Counter Incorrect
  • P1003 GMC Fuel Composition Signals Message Counter Incorrect

|Need help with a P1003 code?

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