P2634

Fuel Pump B Control Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Problems starting the engine
Unstable engine operation at high speeds
Increased fuel consumption

Causes

Short circuit in the pump control circuit to +12V
Faulty fuel pump relay
Wiring harness damage
Problems with the engine control unit
Malfunction of the fuel pump itself B

How to Fix

Check fuel system fuses and relays
Inspect the wiring harness for damage
Check the resistance of the pump control circuit
Test the operation of fuel pump B
If necessary, replace faulty components

Related codes

P2635 P2636 P2637