P062A

Fuel Pump "A" Control Circuit Range/Performance

P062A is a generic OBD-II powertrain diagnostic trouble code: Fuel Pump "A" Control Circuit Range/Performance. It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P062A
Group
Powertrain
System
Powertrain
Severity
Critical (limp mode / no-start)
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What P062A means

P062A is a generic OBD-II code meaning the engine control module has detected that the fuel pump "A" control circuit is not behaving as expected. It belongs to the same group as P0627 to P0629, which cover open, low and high faults on the fuel pump control circuit; P062A is the range and performance member of that set. "A" identifies the primary fuel pump control output, which on most vehicles is the low-pressure lift pump in the tank, driven either through a fuel pump relay or through a dedicated fuel pump control module.

The ECU does not simply switch this output on and hope for the best. It monitors the state of the circuit it commands, comparing what it asked for against feedback such as the voltage seen on the control or feedback line, the current drawn, the reported status from a fuel pump control module, or on returnless systems the resulting fuel pressure. When the commanded state and the observed state disagree, or the circuit responds sluggishly or erratically rather than being cleanly open or shorted, the module stores P062A and typically illuminates the check engine light.

Because this monitor sits on the control side rather than the sensing side, the fault is often in the relay, the pump driver module, the wiring, a ground or the connectors as much as in the pump itself. Since it affects fuel delivery directly, the code can progress from an occasional stumble to a complete no-start.

Common causes

Most-frequently reported root causes when P062A is logged.

  • 1
    A failing or sticking fuel pump relay, or corroded relay socket terminals.
  • 2
    A faulty fuel pump driver module or fuel pump control module that is not reporting or responding correctly.
  • 3
    A fuel pump motor drawing abnormal current because of internal wear, contamination or a partly seized armature.
  • 4
    Damaged, chafed or corroded wiring in the fuel pump control or feedback circuit, including shorts to power or ground.
  • 5
    Corroded or water-damaged connectors at the pump, the tank flange, the relay or the control module.
  • 6
    A poor ground for the fuel pump or its control module, causing high resistance and a slow-responding circuit.
  • 7
    Blown or intermittently failing fuses in the fuel pump supply circuit.
  • 8
    Rodent damage or a previous poorly executed harness repair in the underbody wiring near the tank.

Symptoms drivers notice

The check engine light is on, often with other fuel delivery or misfire codes.
The engine is hard to start, takes several attempts, or will not start at all.
The engine stalls or cuts out while driving, sometimes restarting after a pause.
Loss of power, surging or hesitation under load, on hills or when accelerating hard.
The fuel pump is silent when the ignition is switched on, or makes an unusual whine or buzzing.
Rough running and misfiring that gets worse as the fuel level drops.

How to diagnose P062A

A typical diagnostic flow when this code is present.

  1. 1
    Read all stored codes and freeze frame data, noting whether fuel pressure, misfire or lean codes are also present and under what conditions the code set.
  2. 2
    Check the fuel pump fuses and relay socket, and inspect the relay and its terminals for heat damage, corrosion and a loose fit.
  3. 3
    Inspect the fuel pump wiring from the ECU or driver module through to the tank flange connector, looking for chafing, corrosion, water intrusion and previous repairs.
  4. 4
    Test the pump's ground and supply circuits for voltage drop with the pump running, rather than only checking continuity with the circuit unloaded.
  5. 5
    Watch live data for commanded fuel pump duty or state alongside actual fuel pressure while cranking and at idle, and note any mismatch or lag.
  6. 6
    Verify actual fuel pressure and volume with a gauge against the manufacturer's specification for the vehicle, and check whether it holds steady under load.
  7. 7
    If the circuit, grounds, relay and pressure all check out, back-probe the pump driver or control module inputs and outputs before deciding which component is at fault, and always confirm the diagnosis with measurements rather than replacing the pump on suspicion.

Related powertrain codes

Frequently asked questions

Can I keep driving with a P062A code?

It is risky. The fault directly affects fuel delivery, so the engine can stall in traffic or fail to restart after you switch it off. Running the engine on marginal fuel pressure can also lean the mixture out. Get the vehicle to a workshop promptly and avoid long journeys.

Does P062A mean I need a new fuel pump?

Not necessarily. The code refers to the pump's control circuit, so the relay, the pump driver module, the wiring, a corroded connector or a bad ground are all common culprits. Fuel pressure and circuit testing should confirm where the fault actually lies before the tank is dropped.

Will this code fail an emissions test?

Yes. The stored code and illuminated check engine light are an automatic failure on any inspection that includes an OBD-II scan, and the fuelling problems it causes can also push tailpipe emissions out of specification.

Is P062A expensive to fix?

It depends on the cause. A relay, a fuse or a repaired connector is cheap. A fuel pump control module, or an in-tank pump that requires dropping the fuel tank or removing the rear seat, is considerably more expensive because of the labour involved.

Disabling P062A in software

RaceTune can permanently disable P062A — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

ECU families we can disable P062A on

We hold the DaVinci A2L disable definitions for these families, so the exact P062A path and mask addresses are mapped. verified marks a confirmed disable definition. We support many more — upload your file and our identifier will match it automatically.

  • Bosch EDC17C60 verified
  • Bosch EDC17C66 verified
  • Bosch EDC17CP57 verified

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

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