Code
P062A
Generic
P — Powertrain
Fuel Pump A Control Circuit Range/Performance
Views:
UK: 19
EN: 50
RU: 25
AI status
Completed
Completed
100%
Causes
- Open, short, or high-resistance wiring in the fuel pump control or supply circuit
- Corroded/poor connector or ground at the fuel pump/module
- Failed fuel pump motor or pump module (high internal resistance or intermittent)
- Faulty fuel pump relay or fuse (intermittent contact)
- Faulty fuel pump control module or PCM driver stage
- Low battery or poor battery/charging system voltage during command
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Hard starting, extended cranking or no-start
- Intermittent stalling or rough idle under load
- Loss of power or poor acceleration
- Occasional sputtering or fuel pressure fluctuating
- Possible fuel pump noise changes (high-pitched or labored)
What to check
- Read freeze frame and all stored DTCs; note conditions (voltage, engine speed, temperature)
- Verify battery voltage and charging system under load
- Inspect fuses, relay(s) related to fuel pump and fuel pump control
- Visually inspect fuel pump connector(s) and wiring for corrosion, damage or heat
- Back-probe pump supply and control pins while commanding pump; measure voltage and continuity
- Measure fuel pump current draw and compare to specification
Signal parameters
- Battery/system voltage (key on): ~11–14.5 V (depends on vehicle)
- Control circuit voltage: typically 0–14 V depending on command (0 V = off; switched supply when active)
- PWM duty cycle: 0–100% (fuel pump control may modulate duty to control pump speed/pressure)
- PWM frequency: varies by manufacturer (commonly tens to low thousands of Hz) — consult vehicle-specific data
- Fuel pump current draw (running): typically a few amps to tens of amps depending on pump; verify with vehicle spec
- Fuel pressure (typical gasoline low‑pressure system): roughly 30–80 psi when running (vehicle-specific)
Diagnostic algorithm
- Retrieve and record DTC(s) and freeze-frame data with a scan tool. Check for related codes (voltage, pressure, injector, PCM).
- Verify battery state-of-charge and charging system. Low battery can cause spurious control faults.
- Inspect fuses and fuel pump relay; swap with known-good relay if available and safe to do.
- Visually inspect fuel pump module/tank connector and harness for corrosion, damaged insulation, or melting.
- With a multimeter, check for constant battery feed at pump supply pin (key ON). Back-probe control pin and monitor while engine cranks/runs.
- Use a scope or advanced scan tool to view the control signal — confirm expected duty cycle and frequency and look for irregularities/noise.
- Measure pump current draw (in-line ammeter) while running; compare to spec. Excessive or very low current indicates pump or wiring issue.
- Measure fuel pressure and watch for pressure variation matching control signal or code occurrence.
- Check continuity and resistance between PCM/pump controller and pump connector, and verify good ground continuity to chassis/engine.
- If wiring and supply are good but signal/performance is still out of range, consider replacing the pump module or fuel pump control module. If control driver in PCM suspected, consult manufacturer guidance before replacing.
- After repairs, clear codes, confirm proper live data (voltage, duty, current, pressure) and perform road test to ensure code does not return.
Likely causes
- Corroded connector or poor ground at tank-mounted pump module
- High resistance in supply or control wire causing voltage drop under load
- Failing pump that draws excessive or inconsistent current
- Damaged PWM driver in the PCM or separate pump control module
- Intermittent relay or poor fuse connection causing intermittent supply
Fault status
Status
Fuel Pump A control circuit range/performance outside expected parameters (voltage/current/duty cycle); intermittent or sustained abnormal fuel pump behavior detected.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Workshop Manuals
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Code
P062A
LAND ROVER
P — Powertrain
Fuel Pump A Control - Range/Performance Circuit
Views:
UK: 7
EN: 14
RU: 9
AI status
Completed
Completed
100%
Causes
- Open, short, or high-resistance wiring in the fuel pump control or supply circuit
- Corroded/poor connector or ground at the fuel pump/module
- Failed fuel pump motor or pump module (high internal resistance or intermittent)
- Faulty fuel pump relay or fuse (intermittent contact)
- Faulty fuel pump control module or PCM driver stage
- Low battery or poor battery/charging system voltage during command
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Hard starting, extended cranking or no-start
- Intermittent stalling or rough idle under load
- Loss of power or poor acceleration
- Occasional sputtering or fuel pressure fluctuating
- Possible fuel pump noise changes (high-pitched or labored)
What to check
- Read freeze frame and all stored DTCs; note conditions (voltage, engine speed, temperature)
- Verify battery voltage and charging system under load
- Inspect fuses, relay(s) related to fuel pump and fuel pump control
- Visually inspect fuel pump connector(s) and wiring for corrosion, damage or heat
- Back-probe pump supply and control pins while commanding pump; measure voltage and continuity
- Measure fuel pump current draw and compare to specification
Signal parameters
- Battery/system voltage (key on): ~11–14.5 V (depends on vehicle)
- Control circuit voltage: typically 0–14 V depending on command (0 V = off; switched supply when active)
- PWM duty cycle: 0–100% (fuel pump control may modulate duty to control pump speed/pressure)
- PWM frequency: varies by manufacturer (commonly tens to low thousands of Hz) — consult vehicle-specific data
- Fuel pump current draw (running): typically a few amps to tens of amps depending on pump; verify with vehicle spec
- Fuel pressure (typical gasoline low‑pressure system): roughly 30–80 psi when running (vehicle-specific)
Diagnostic algorithm
- Retrieve and record DTC(s) and freeze-frame data with a scan tool. Check for related codes (voltage, pressure, injector, PCM).
- Verify battery state-of-charge and charging system. Low battery can cause spurious control faults.
- Inspect fuses and fuel pump relay; swap with known-good relay if available and safe to do.
- Visually inspect fuel pump module/tank connector and harness for corrosion, damaged insulation, or melting.
- With a multimeter, check for constant battery feed at pump supply pin (key ON). Back-probe control pin and monitor while engine cranks/runs.
- Use a scope or advanced scan tool to view the control signal — confirm expected duty cycle and frequency and look for irregularities/noise.
- Measure pump current draw (in-line ammeter) while running; compare to spec. Excessive or very low current indicates pump or wiring issue.
- Measure fuel pressure and watch for pressure variation matching control signal or code occurrence.
- Check continuity and resistance between PCM/pump controller and pump connector, and verify good ground continuity to chassis/engine.
- If wiring and supply are good but signal/performance is still out of range, consider replacing the pump module or fuel pump control module. If control driver in PCM suspected, consult manufacturer guidance before replacing.
- After repairs, clear codes, confirm proper live data (voltage, duty, current, pressure) and perform road test to ensure code does not return.
Likely causes
- Corroded connector or poor ground at tank-mounted pump module
- High resistance in supply or control wire causing voltage drop under load
- Failing pump that draws excessive or inconsistent current
- Damaged PWM driver in the PCM or separate pump control module
- Intermittent relay or poor fuse connection causing intermittent supply
Fault status
Status
Fuel Pump A control circuit range/performance outside expected parameters (voltage/current/duty cycle); intermittent or sustained abnormal fuel pump behavior detected.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
HTML Workshop Manuals AI manual library for LAND ROVER Click to show available manuals 1
LAND ROVER 2015 Discovery Sport HSE
HTML ManualWorkshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
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0
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