OBD Guide
ENFRDEESPT

P1934

Fuel Additive Pump Control Circuit High

P1934 is an OBD-II diagnostic trouble code meaning: Fuel Additive Pump Control Circuit High. Common causes: short circuit to positive in the control circuit, fuel additive pump malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine Light Is On
  • Reduced engine power
  • Increased fuel consumption
  • Increased emissions of harmful substances
  • Possible problems starting the engine

Causes

  • Short circuit to positive in the control circuit
  • Fuel additive pump malfunction
  • Wiring harness damage
  • Relay or fuse problems
  • Engine control unit malfunction

How to Fix

  1. Check the integrity of the pump control circuit
  2. Check fuses and relays
  3. Test the fuel additive pump
  4. Check connections and connectors
  5. If necessary, replace the pump or wiring

Related codes

P1935P1936P1933

FAQ

What does the P1934 code mean?

P1934 is an OBD-II diagnostic trouble code that indicates: Fuel Additive Pump Control Circuit High

What causes a P1934 error code?

The most common causes of P1934 include: Short circuit to positive in the control circuit; Fuel additive pump malfunction; Wiring harness damage; Relay or fuse problems.

How do I fix a P1934 diagnostic trouble code?

To fix P1934: Check the integrity of the pump control circuit. Check fuses and relays. Test the fuel additive pump. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1934?

Yes, but get it checked soon

How much does it cost to fix P1934?

The estimated repair cost for P1934 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat