OBD Guide
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P1664

Injection Pump Control Module Faulty

P1664 is an OBD-II diagnostic trouble code meaning: Injection Pump Control Module Faulty. Common causes: malfunction of the fuel injection pump control module, problems with wiring to the module. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Unstable engine operation
  • Problems starting the engine
  • Reduced engine power
  • Increased fuel consumption
  • Check Engine Light Illuminates

Causes

  • Malfunction of the fuel injection pump control module
  • Problems with wiring to the module
  • Bad contacts in connectors
  • Mechanical damage to fuel injection pump
  • ECU software failure

How to Fix

  1. Check the condition of the wiring and connectors
  2. Test the injection pump control module
  3. Replace the control module if necessary
  4. Update ECU firmware
  5. Check the operation of the injection pump itself

Related codes

P1663P1665P1666

Error P1664 by Vehicle Brand

BuickCadillacChevroletGMGMCOldsmobileSaturn

FAQ

What does the P1664 code mean?

P1664 is an OBD-II diagnostic trouble code that indicates: Injection Pump Control Module Faulty

What causes a P1664 error code?

The most common causes of P1664 include: Malfunction of the fuel injection pump control module; Problems with wiring to the module; Bad contacts in connectors; Mechanical damage to fuel injection pump.

How do I fix a P1664 diagnostic trouble code?

To fix P1664: Check the condition of the wiring and connectors. Test the injection pump control module. Replace the control module if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1664?

Do not drive — repair immediately

How much does it cost to fix P1664?

The estimated repair cost for P1664 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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