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Home / DTC / P0230 — Fuel Pump Primary Circuit

P0230 — Fuel Pump Primary Circuit

Detailed page for trouble code P0230.

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23,694specific
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P0230

Generic P — Powertrain

Fuel Pump Primary Circuit

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for fuel pump circuit
  • Faulty fuel pump relay or relay socket
  • Broken, corroded or disconnected wiring/connectors in the pump power feed
  • Faulty fuel pump (internal open/short)
  • Poor battery or ground connections
  • Faulty PCM/ECM driver or internal relay

Symptoms

  • Engine cranks but does not start or hard to start
  • No fuel pressure or low fuel pressure
  • Intermittent stalling or loss of power
  • MIL (check engine light) illuminated
  • Fuel pump does not prime when key is turned to ON

What to check

  • Verify code and any related codes (P0231/P0232 etc.) and freeze frame data
  • Check battery voltage and state of charge before testing (should be ~12.4–12.8 V at rest)
  • Inspect fuse(s) and fuse holder for the fuel pump circuit
  • Inspect/operate fuel pump relay and swap with known-good relay if available
  • Visually inspect wiring and connectors from relay/fuse to pump for corrosion, damage, rodent chew, or open pins
  • Back-probe pump power terminal with key ON to confirm presence of battery voltage

Signal parameters

  • Key ON (prime): voltage at pump power terminal ≈ battery voltage (nominal 11.5–14.5 V)
  • While cranking/running: voltage at pump should remain near battery voltage, not drop >2–3 V under load
  • Pump motor resistance (DC, low ohms): typical 0.3–2.0 Ω (varies by design) — check OEM spec where available
  • Pump current draw typical range: ~4–12 A under normal conditions (varies by pump), excessive current indicates short or mechanical load
  • If PWM controlled, driver duty cycle/frequency varies by vehicle; expected duty not to be 0% when commanded

Diagnostic algorithm

  1. Confirm P0230 is current/stored. Note freeze frame (battery voltage, engine speed, load).
  2. Check battery condition and connections. Recharge or replace weak battery before testing.
  3. Inspect and test relevant fuses and the fuel pump relay. Replace relay if suspect.
  4. With key ON (engine OFF) back-probe pump power lead at pump connector; verify battery voltage is present during prime. If no voltage, trace back to relay/fuse/PCM.
  5. Operate relay manually (or energize from fused battery) to see if pump runs. If pump runs when directly powered, suspect wiring/relay/PCM.
  6. Measure voltage at pump while cranking and while running. If voltage drops significantly under load, inspect for high resistance connections or grounding issues.
  7. Disconnect pump and measure motor resistance and current when directly powered (bench test) to determine internal pump fault.
  8. Wiggle wiring and connectors while monitoring voltage/current to reproduce intermittent faults.
  9. If wiring and pump check good, test PCM driver output for continuity to ground/switching (use appropriate scope or DVOM only per manufacturer procedure). Replace PCM only after eliminating wiring, relay, and pump as causes.
  10. Repair or replace failed components (wiring, connectors, relay, pump). Clear codes and retest drive cycle to ensure fault does not return.

Likely causes

  • Open wire between fuse/relay and fuel pump connector
  • Relay stuck open or contact failure
  • Corroded connector at in-tank pump module
  • High resistance ground causing voltage drop under load
  • Pump motor seized or shorted causing circuit fault
  • PCM output driver failure (less common)

Fault status

⚠️ Status
Stored DTC: Fuel Pump Primary Circuit — PCM detected open/short/low voltage or intermittent condition in the fuel pump primary power/control circuit. MIL may be ON.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

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Code

P0230

GWM P — Powertrain

- Fuel Pump Primary Circuit Malfunction

Brand: GWM
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for fuel pump circuit
  • Faulty fuel pump relay or relay socket
  • Broken, corroded or disconnected wiring/connectors in the pump power feed
  • Faulty fuel pump (internal open/short)
  • Poor battery or ground connections
  • Faulty PCM/ECM driver or internal relay

Symptoms

  • Engine cranks but does not start or hard to start
  • No fuel pressure or low fuel pressure
  • Intermittent stalling or loss of power
  • MIL (check engine light) illuminated
  • Fuel pump does not prime when key is turned to ON

What to check

  • Verify code and any related codes (P0231/P0232 etc.) and freeze frame data
  • Check battery voltage and state of charge before testing (should be ~12.4–12.8 V at rest)
  • Inspect fuse(s) and fuse holder for the fuel pump circuit
  • Inspect/operate fuel pump relay and swap with known-good relay if available
  • Visually inspect wiring and connectors from relay/fuse to pump for corrosion, damage, rodent chew, or open pins
  • Back-probe pump power terminal with key ON to confirm presence of battery voltage

Signal parameters

  • Key ON (prime): voltage at pump power terminal ≈ battery voltage (nominal 11.5–14.5 V)
  • While cranking/running: voltage at pump should remain near battery voltage, not drop >2–3 V under load
  • Pump motor resistance (DC, low ohms): typical 0.3–2.0 Ω (varies by design) — check OEM spec where available
  • Pump current draw typical range: ~4–12 A under normal conditions (varies by pump), excessive current indicates short or mechanical load
  • If PWM controlled, driver duty cycle/frequency varies by vehicle; expected duty not to be 0% when commanded

Diagnostic algorithm

  1. Confirm P0230 is current/stored. Note freeze frame (battery voltage, engine speed, load).
  2. Check battery condition and connections. Recharge or replace weak battery before testing.
  3. Inspect and test relevant fuses and the fuel pump relay. Replace relay if suspect.
  4. With key ON (engine OFF) back-probe pump power lead at pump connector; verify battery voltage is present during prime. If no voltage, trace back to relay/fuse/PCM.
  5. Operate relay manually (or energize from fused battery) to see if pump runs. If pump runs when directly powered, suspect wiring/relay/PCM.
  6. Measure voltage at pump while cranking and while running. If voltage drops significantly under load, inspect for high resistance connections or grounding issues.
  7. Disconnect pump and measure motor resistance and current when directly powered (bench test) to determine internal pump fault.
  8. Wiggle wiring and connectors while monitoring voltage/current to reproduce intermittent faults.
  9. If wiring and pump check good, test PCM driver output for continuity to ground/switching (use appropriate scope or DVOM only per manufacturer procedure). Replace PCM only after eliminating wiring, relay, and pump as causes.
  10. Repair or replace failed components (wiring, connectors, relay, pump). Clear codes and retest drive cycle to ensure fault does not return.

Likely causes

  • Open wire between fuse/relay and fuel pump connector
  • Relay stuck open or contact failure
  • Corroded connector at in-tank pump module
  • High resistance ground causing voltage drop under load
  • Pump motor seized or shorted causing circuit fault
  • PCM output driver failure (less common)

Fault status

⚠️ Status
Stored DTC: Fuel Pump Primary Circuit — PCM detected open/short/low voltage or intermittent condition in the fuel pump primary power/control circuit. MIL may be ON.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0231 P0232 P0627 P0628 P0562 P0610
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Code

P0230

HUMMER P — Powertrain

Fuel Pump Relay Control Circuit

Brand: HUMMER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for fuel pump circuit
  • Faulty fuel pump relay or relay socket
  • Broken, corroded or disconnected wiring/connectors in the pump power feed
  • Faulty fuel pump (internal open/short)
  • Poor battery or ground connections
  • Faulty PCM/ECM driver or internal relay

Symptoms

  • Engine cranks but does not start or hard to start
  • No fuel pressure or low fuel pressure
  • Intermittent stalling or loss of power
  • MIL (check engine light) illuminated
  • Fuel pump does not prime when key is turned to ON

What to check

  • Verify code and any related codes (P0231/P0232 etc.) and freeze frame data
  • Check battery voltage and state of charge before testing (should be ~12.4–12.8 V at rest)
  • Inspect fuse(s) and fuse holder for the fuel pump circuit
  • Inspect/operate fuel pump relay and swap with known-good relay if available
  • Visually inspect wiring and connectors from relay/fuse to pump for corrosion, damage, rodent chew, or open pins
  • Back-probe pump power terminal with key ON to confirm presence of battery voltage

Signal parameters

  • Key ON (prime): voltage at pump power terminal ≈ battery voltage (nominal 11.5–14.5 V)
  • While cranking/running: voltage at pump should remain near battery voltage, not drop >2–3 V under load
  • Pump motor resistance (DC, low ohms): typical 0.3–2.0 Ω (varies by design) — check OEM spec where available
  • Pump current draw typical range: ~4–12 A under normal conditions (varies by pump), excessive current indicates short or mechanical load
  • If PWM controlled, driver duty cycle/frequency varies by vehicle; expected duty not to be 0% when commanded

Diagnostic algorithm

  1. Confirm P0230 is current/stored. Note freeze frame (battery voltage, engine speed, load).
  2. Check battery condition and connections. Recharge or replace weak battery before testing.
  3. Inspect and test relevant fuses and the fuel pump relay. Replace relay if suspect.
  4. With key ON (engine OFF) back-probe pump power lead at pump connector; verify battery voltage is present during prime. If no voltage, trace back to relay/fuse/PCM.
  5. Operate relay manually (or energize from fused battery) to see if pump runs. If pump runs when directly powered, suspect wiring/relay/PCM.
  6. Measure voltage at pump while cranking and while running. If voltage drops significantly under load, inspect for high resistance connections or grounding issues.
  7. Disconnect pump and measure motor resistance and current when directly powered (bench test) to determine internal pump fault.
  8. Wiggle wiring and connectors while monitoring voltage/current to reproduce intermittent faults.
  9. If wiring and pump check good, test PCM driver output for continuity to ground/switching (use appropriate scope or DVOM only per manufacturer procedure). Replace PCM only after eliminating wiring, relay, and pump as causes.
  10. Repair or replace failed components (wiring, connectors, relay, pump). Clear codes and retest drive cycle to ensure fault does not return.

Likely causes

  • Open wire between fuse/relay and fuel pump connector
  • Relay stuck open or contact failure
  • Corroded connector at in-tank pump module
  • High resistance ground causing voltage drop under load
  • Pump motor seized or shorted causing circuit fault
  • PCM output driver failure (less common)

Fault status

⚠️ Status
Stored DTC: Fuel Pump Primary Circuit — PCM detected open/short/low voltage or intermittent condition in the fuel pump primary power/control circuit. MIL may be ON.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0231 P0232 P0627 P0628 P0562 P0610
Repair manuals

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Code

P0230

HYUNDAI P — Powertrain

Fuel Pump Primary Circuit Malfunction

Brand: HYUNDAI
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for fuel pump circuit
  • Faulty fuel pump relay or relay socket
  • Broken, corroded or disconnected wiring/connectors in the pump power feed
  • Faulty fuel pump (internal open/short)
  • Poor battery or ground connections
  • Faulty PCM/ECM driver or internal relay

Symptoms

  • Engine cranks but does not start or hard to start
  • No fuel pressure or low fuel pressure
  • Intermittent stalling or loss of power
  • MIL (check engine light) illuminated
  • Fuel pump does not prime when key is turned to ON

What to check

  • Verify code and any related codes (P0231/P0232 etc.) and freeze frame data
  • Check battery voltage and state of charge before testing (should be ~12.4–12.8 V at rest)
  • Inspect fuse(s) and fuse holder for the fuel pump circuit
  • Inspect/operate fuel pump relay and swap with known-good relay if available
  • Visually inspect wiring and connectors from relay/fuse to pump for corrosion, damage, rodent chew, or open pins
  • Back-probe pump power terminal with key ON to confirm presence of battery voltage

Signal parameters

  • Key ON (prime): voltage at pump power terminal ≈ battery voltage (nominal 11.5–14.5 V)
  • While cranking/running: voltage at pump should remain near battery voltage, not drop >2–3 V under load
  • Pump motor resistance (DC, low ohms): typical 0.3–2.0 Ω (varies by design) — check OEM spec where available
  • Pump current draw typical range: ~4–12 A under normal conditions (varies by pump), excessive current indicates short or mechanical load
  • If PWM controlled, driver duty cycle/frequency varies by vehicle; expected duty not to be 0% when commanded

Diagnostic algorithm

  1. Confirm P0230 is current/stored. Note freeze frame (battery voltage, engine speed, load).
  2. Check battery condition and connections. Recharge or replace weak battery before testing.
  3. Inspect and test relevant fuses and the fuel pump relay. Replace relay if suspect.
  4. With key ON (engine OFF) back-probe pump power lead at pump connector; verify battery voltage is present during prime. If no voltage, trace back to relay/fuse/PCM.
  5. Operate relay manually (or energize from fused battery) to see if pump runs. If pump runs when directly powered, suspect wiring/relay/PCM.
  6. Measure voltage at pump while cranking and while running. If voltage drops significantly under load, inspect for high resistance connections or grounding issues.
  7. Disconnect pump and measure motor resistance and current when directly powered (bench test) to determine internal pump fault.
  8. Wiggle wiring and connectors while monitoring voltage/current to reproduce intermittent faults.
  9. If wiring and pump check good, test PCM driver output for continuity to ground/switching (use appropriate scope or DVOM only per manufacturer procedure). Replace PCM only after eliminating wiring, relay, and pump as causes.
  10. Repair or replace failed components (wiring, connectors, relay, pump). Clear codes and retest drive cycle to ensure fault does not return.

Likely causes

  • Open wire between fuse/relay and fuel pump connector
  • Relay stuck open or contact failure
  • Corroded connector at in-tank pump module
  • High resistance ground causing voltage drop under load
  • Pump motor seized or shorted causing circuit fault
  • PCM output driver failure (less common)

Fault status

⚠️ Status
Stored DTC: Fuel Pump Primary Circuit — PCM detected open/short/low voltage or intermittent condition in the fuel pump primary power/control circuit. MIL may be ON.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

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P0231 P0232 P0627 P0628 P0562 P0610
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HYUNDAI

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Code

P0230

LAND ROVER P — Powertrain

Malfunction of the primary circuit of the fuel pump

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for fuel pump circuit
  • Faulty fuel pump relay or relay socket
  • Broken, corroded or disconnected wiring/connectors in the pump power feed
  • Faulty fuel pump (internal open/short)
  • Poor battery or ground connections
  • Faulty PCM/ECM driver or internal relay

Symptoms

  • Engine cranks but does not start or hard to start
  • No fuel pressure or low fuel pressure
  • Intermittent stalling or loss of power
  • MIL (check engine light) illuminated
  • Fuel pump does not prime when key is turned to ON

What to check

  • Verify code and any related codes (P0231/P0232 etc.) and freeze frame data
  • Check battery voltage and state of charge before testing (should be ~12.4–12.8 V at rest)
  • Inspect fuse(s) and fuse holder for the fuel pump circuit
  • Inspect/operate fuel pump relay and swap with known-good relay if available
  • Visually inspect wiring and connectors from relay/fuse to pump for corrosion, damage, rodent chew, or open pins
  • Back-probe pump power terminal with key ON to confirm presence of battery voltage

Signal parameters

  • Key ON (prime): voltage at pump power terminal ≈ battery voltage (nominal 11.5–14.5 V)
  • While cranking/running: voltage at pump should remain near battery voltage, not drop >2–3 V under load
  • Pump motor resistance (DC, low ohms): typical 0.3–2.0 Ω (varies by design) — check OEM spec where available
  • Pump current draw typical range: ~4–12 A under normal conditions (varies by pump), excessive current indicates short or mechanical load
  • If PWM controlled, driver duty cycle/frequency varies by vehicle; expected duty not to be 0% when commanded

Diagnostic algorithm

  1. Confirm P0230 is current/stored. Note freeze frame (battery voltage, engine speed, load).
  2. Check battery condition and connections. Recharge or replace weak battery before testing.
  3. Inspect and test relevant fuses and the fuel pump relay. Replace relay if suspect.
  4. With key ON (engine OFF) back-probe pump power lead at pump connector; verify battery voltage is present during prime. If no voltage, trace back to relay/fuse/PCM.
  5. Operate relay manually (or energize from fused battery) to see if pump runs. If pump runs when directly powered, suspect wiring/relay/PCM.
  6. Measure voltage at pump while cranking and while running. If voltage drops significantly under load, inspect for high resistance connections or grounding issues.
  7. Disconnect pump and measure motor resistance and current when directly powered (bench test) to determine internal pump fault.
  8. Wiggle wiring and connectors while monitoring voltage/current to reproduce intermittent faults.
  9. If wiring and pump check good, test PCM driver output for continuity to ground/switching (use appropriate scope or DVOM only per manufacturer procedure). Replace PCM only after eliminating wiring, relay, and pump as causes.
  10. Repair or replace failed components (wiring, connectors, relay, pump). Clear codes and retest drive cycle to ensure fault does not return.

Likely causes

  • Open wire between fuse/relay and fuel pump connector
  • Relay stuck open or contact failure
  • Corroded connector at in-tank pump module
  • High resistance ground causing voltage drop under load
  • Pump motor seized or shorted causing circuit fault
  • PCM output driver failure (less common)

Fault status

⚠️ Status
Stored DTC: Fuel Pump Primary Circuit — PCM detected open/short/low voltage or intermittent condition in the fuel pump primary power/control circuit. MIL may be ON.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0231 P0232 P0627 P0628 P0562 P0610
413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

P0230

MITSUBISHI P — Powertrain

Fuel pump relay

Brand: MITSUBISHI
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for fuel pump circuit
  • Faulty fuel pump relay or relay socket
  • Broken, corroded or disconnected wiring/connectors in the pump power feed
  • Faulty fuel pump (internal open/short)
  • Poor battery or ground connections
  • Faulty PCM/ECM driver or internal relay

Symptoms

  • Engine cranks but does not start or hard to start
  • No fuel pressure or low fuel pressure
  • Intermittent stalling or loss of power
  • MIL (check engine light) illuminated
  • Fuel pump does not prime when key is turned to ON

What to check

  • Verify code and any related codes (P0231/P0232 etc.) and freeze frame data
  • Check battery voltage and state of charge before testing (should be ~12.4–12.8 V at rest)
  • Inspect fuse(s) and fuse holder for the fuel pump circuit
  • Inspect/operate fuel pump relay and swap with known-good relay if available
  • Visually inspect wiring and connectors from relay/fuse to pump for corrosion, damage, rodent chew, or open pins
  • Back-probe pump power terminal with key ON to confirm presence of battery voltage

Signal parameters

  • Key ON (prime): voltage at pump power terminal ≈ battery voltage (nominal 11.5–14.5 V)
  • While cranking/running: voltage at pump should remain near battery voltage, not drop >2–3 V under load
  • Pump motor resistance (DC, low ohms): typical 0.3–2.0 Ω (varies by design) — check OEM spec where available
  • Pump current draw typical range: ~4–12 A under normal conditions (varies by pump), excessive current indicates short or mechanical load
  • If PWM controlled, driver duty cycle/frequency varies by vehicle; expected duty not to be 0% when commanded

Diagnostic algorithm

  1. Confirm P0230 is current/stored. Note freeze frame (battery voltage, engine speed, load).
  2. Check battery condition and connections. Recharge or replace weak battery before testing.
  3. Inspect and test relevant fuses and the fuel pump relay. Replace relay if suspect.
  4. With key ON (engine OFF) back-probe pump power lead at pump connector; verify battery voltage is present during prime. If no voltage, trace back to relay/fuse/PCM.
  5. Operate relay manually (or energize from fused battery) to see if pump runs. If pump runs when directly powered, suspect wiring/relay/PCM.
  6. Measure voltage at pump while cranking and while running. If voltage drops significantly under load, inspect for high resistance connections or grounding issues.
  7. Disconnect pump and measure motor resistance and current when directly powered (bench test) to determine internal pump fault.
  8. Wiggle wiring and connectors while monitoring voltage/current to reproduce intermittent faults.
  9. If wiring and pump check good, test PCM driver output for continuity to ground/switching (use appropriate scope or DVOM only per manufacturer procedure). Replace PCM only after eliminating wiring, relay, and pump as causes.
  10. Repair or replace failed components (wiring, connectors, relay, pump). Clear codes and retest drive cycle to ensure fault does not return.

Likely causes

  • Open wire between fuse/relay and fuel pump connector
  • Relay stuck open or contact failure
  • Corroded connector at in-tank pump module
  • High resistance ground causing voltage drop under load
  • Pump motor seized or shorted causing circuit fault
  • PCM output driver failure (less common)

Fault status

⚠️ Status
Stored DTC: Fuel Pump Primary Circuit — PCM detected open/short/low voltage or intermittent condition in the fuel pump primary power/control circuit. MIL may be ON.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0231 P0232 P0627 P0628 P0562 P0610
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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Code

P0230

VOLKSWAGEN P — Powertrain

Fuel Pump Primary Circuit Malfunction

Brand: VOLKSWAGEN
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for fuel pump circuit
  • Faulty fuel pump relay or relay socket
  • Broken, corroded or disconnected wiring/connectors in the pump power feed
  • Faulty fuel pump (internal open/short)
  • Poor battery or ground connections
  • Faulty PCM/ECM driver or internal relay

Symptoms

  • Engine cranks but does not start or hard to start
  • No fuel pressure or low fuel pressure
  • Intermittent stalling or loss of power
  • MIL (check engine light) illuminated
  • Fuel pump does not prime when key is turned to ON

What to check

  • Verify code and any related codes (P0231/P0232 etc.) and freeze frame data
  • Check battery voltage and state of charge before testing (should be ~12.4–12.8 V at rest)
  • Inspect fuse(s) and fuse holder for the fuel pump circuit
  • Inspect/operate fuel pump relay and swap with known-good relay if available
  • Visually inspect wiring and connectors from relay/fuse to pump for corrosion, damage, rodent chew, or open pins
  • Back-probe pump power terminal with key ON to confirm presence of battery voltage

Signal parameters

  • Key ON (prime): voltage at pump power terminal ≈ battery voltage (nominal 11.5–14.5 V)
  • While cranking/running: voltage at pump should remain near battery voltage, not drop >2–3 V under load
  • Pump motor resistance (DC, low ohms): typical 0.3–2.0 Ω (varies by design) — check OEM spec where available
  • Pump current draw typical range: ~4–12 A under normal conditions (varies by pump), excessive current indicates short or mechanical load
  • If PWM controlled, driver duty cycle/frequency varies by vehicle; expected duty not to be 0% when commanded

Diagnostic algorithm

  1. Confirm P0230 is current/stored. Note freeze frame (battery voltage, engine speed, load).
  2. Check battery condition and connections. Recharge or replace weak battery before testing.
  3. Inspect and test relevant fuses and the fuel pump relay. Replace relay if suspect.
  4. With key ON (engine OFF) back-probe pump power lead at pump connector; verify battery voltage is present during prime. If no voltage, trace back to relay/fuse/PCM.
  5. Operate relay manually (or energize from fused battery) to see if pump runs. If pump runs when directly powered, suspect wiring/relay/PCM.
  6. Measure voltage at pump while cranking and while running. If voltage drops significantly under load, inspect for high resistance connections or grounding issues.
  7. Disconnect pump and measure motor resistance and current when directly powered (bench test) to determine internal pump fault.
  8. Wiggle wiring and connectors while monitoring voltage/current to reproduce intermittent faults.
  9. If wiring and pump check good, test PCM driver output for continuity to ground/switching (use appropriate scope or DVOM only per manufacturer procedure). Replace PCM only after eliminating wiring, relay, and pump as causes.
  10. Repair or replace failed components (wiring, connectors, relay, pump). Clear codes and retest drive cycle to ensure fault does not return.

Likely causes

  • Open wire between fuse/relay and fuel pump connector
  • Relay stuck open or contact failure
  • Corroded connector at in-tank pump module
  • High resistance ground causing voltage drop under load
  • Pump motor seized or shorted causing circuit fault
  • PCM output driver failure (less common)

Fault status

⚠️ Status
Stored DTC: Fuel Pump Primary Circuit — PCM detected open/short/low voltage or intermittent condition in the fuel pump primary power/control circuit. MIL may be ON.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0231 P0232 P0627 P0628 P0562 P0610
626

Browse 626 VOLKSWAGEN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

VOLKSWAGEN

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Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

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