Engine-Codes - Generic - P1688

P1688 Code - Internal Fuel Injection Pump Controller Failure

- Code Popularity: 23,949 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?

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 P1688 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 P1688 Code Mean?

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.

P1688 Code - Internal Fuel Injection Pump Controller Failure

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Code P1688 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

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