OBD Guide
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P1929

Fuel Additive Level Pump Control Circuit Performance

P1929 is an OBD-II diagnostic trouble code meaning: Fuel Additive Level Pump Control Circuit Performance. Common causes: fuel additive pump malfunction, open or short circuit in control circuit. Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Check Engine Light Is On
  • Reduced engine performance
  • Increased fuel consumption
  • Unstable engine idling
  • Problems starting the engine

Causes

  • Fuel additive pump malfunction
  • Open or short circuit in control circuit
  • Poor contact in connectors
  • Engine control unit malfunction
  • Pump relay problems

How to Fix

  1. Check the integrity of the pump control circuit
  2. Check connections and connectors of the pump
  3. Test the performance of the fuel additive pump
  4. Check relays and circuit fuses
  5. Replace the fuel additive pump if necessary.

Related codes

P1928P1930P1931

FAQ

What does the P1929 code mean?

P1929 is an OBD-II diagnostic trouble code that indicates: Fuel Additive Level Pump Control Circuit Performance

What causes a P1929 error code?

The most common causes of P1929 include: Fuel additive pump malfunction; Open or short circuit in control circuit; Poor contact in connectors; Engine control unit malfunction.

How do I fix a P1929 diagnostic trouble code?

To fix P1929: Check the integrity of the pump control circuit. Check connections and connectors of the pump. Test the performance of the fuel additive pump. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1929?

Yes, but get it checked soon

How much does it cost to fix P1929?

The estimated repair cost for P1929 is $28–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat