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AutoCodes - Generic - P1688

P1688 Code - Internal Fuel Injection Pump Controller Failure

- Code Popularity: 23,948 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1688?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Good Trip Counter Equals Zero
  • Faulty Fuel Pump Control Module (FPCM)
  • Fuel Pump Control Module (FPCM) harness is open or shorted
  • Fuel Pump Control Module (FPCM) circuit poor electrical connection
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How to Fix the DTC P1688?

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.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1688 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 P1688 Description

Fuel Pump Control Module (FPCM) is monitored with ignition on engine off, and with the engine running. The P1688 code may set if FPCM, Powertrain Control Module (PCM) memory, programming or hardware error is detected.

OBDII Code P1688 - Internal Fuel Injection Pump Controller Failure - AutoCodes.com
P1688 Code - Internal Fuel Injection Pump Controller Failure

Need More Information on the Code?

Need more information on how to fix the P1688 code? Get Access to Factory Service Manuals

Information for Specific Makes

  • P1688 Chrysler Internal Fuel Injection Pump Controller Failure
  • P1688 Dodge Internal Fuel Injection Pump Controller Failure
  • P1688 Jeep Internal Fuel Injection Pump Controller Failure

Need Help with the Code?

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Code P1688 comments

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