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DTC codes / P06xx · Computer and output circuits / P062A

P062AFuel Pump A Control Circuit Range/Performance

P062A indicates that the powertrain control module (PCM) has detected an out-of-range or performance fault in the control circuit for fuel pump 'A', which is the primary fuel pump on most vehicles. The PCM monitors the circuit for expected voltage or current behavior and sets this code when the signal does not match the commanded state, often due to a wiring fault, a failing pump, or a faulty control module.

SystemPowertrain
Code typeGeneric (all makes)
SeverityHigh
Fix difficultyIntermediate
AreaComputer and output circuits

Symptoms you may notice

  • Illuminated check engine light, often with no other noticeable symptoms
  • Engine cranks but fails to start or starts only after long cranking
  • Intermittent stalling or a sudden loss of power while driving
  • Rough running or misfiring under load due to low fuel pressure
  • Fuel pump may not prime when the ignition is turned on
  • Reduced engine performance or limp mode in some vehicles

Common causes, most likely first

  1. Damaged or corroded wiring in the fuel pump control circuit, including chafed harnesses or bad grounds
  2. Faulty fuel pump control module (FPCM) or relay, if equipped
  3. Failed fuel pump assembly with an internal short or open in the control circuit
  4. Blown fuse or tripped circuit breaker in the fuel pump power circuit
  5. Poor electrical connection at the fuel pump connector or PCM connector
  6. PCM internal fault affecting the fuel pump control output

How to diagnose and fix it

  1. Verify the code with a scan tool and check for related codes in other modules
  2. Inspect the fuel pump fuse and relay, and test for power and ground at the fuel pump connector
  3. Perform a voltage drop test on the fuel pump control circuit to identify excessive resistance
  4. Check the fuel pump control module (if equipped) for proper operation and communication
  5. Measure fuel pressure with a gauge to confirm the pump is not delivering adequate volume
  6. Repair or replace damaged wiring, connectors, or grounds as needed
  7. If all electrical checks pass, replace the fuel pump assembly or PCM as indicated by further testing

What most technicians overlook on P062A

  • A weak fuel pump can set P062A without completely failing, so a fuel pressure and volume test is essential before condemning the control circuit.
  • Corrosion inside the fuel pump connector often mimics a failed pump, and simply cleaning the terminals can resolve the code.
  • On vehicles with a fuel pump control module, a faulty module can set P062A even when the pump itself is good, so test the module output before replacing the pump.
  • The PCM may set P062A due to a low battery or charging system issue that causes voltage spikes, so always check battery health and grounds first.
  • In some cases, a restricted fuel filter or pinched fuel line increases pump current draw and triggers the performance code, so inspect the entire fuel delivery system.

Can I keep driving with P062A?

If the engine is running normally, you can drive cautiously to a repair shop, but avoid heavy loads or long trips because the fuel pump could fail suddenly. If the engine stalls or will not start, do not drive and have the vehicle towed to prevent a dangerous breakdown.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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