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DTC codes / P0Exx · Hybrid propulsion / P0E62

P0E62Battery Charger A Enable Circuit Low

P0E62 indicates that the powertrain control module has detected a low-voltage condition on the enable circuit for battery charger A, which is the control line that wakes up or activates the auxiliary battery charging system. The circuit is expected to carry a voltage signal when the charger is commanded on, but the module sees the line stuck low, meaning the charger is not being enabled as intended.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaHybrid propulsion

Symptoms you may notice

  • Illumination of the check engine light or service vehicle soon message with no other noticeable issues
  • Auxiliary battery not charging, leading to a dead battery or reduced electric-only range on hybrid vehicles
  • Reduced power or limp mode if the vehicle relies on the auxiliary battery for system voltage stability
  • Warning message on the dash indicating a charging system fault or battery saver active
  • Intermittent electrical gremlins such as flickering lights or infotainment resets due to low system voltage
  • Often no symptoms besides the warning light, especially if the main battery still maintains sufficient charge

Common causes, most likely first

  1. Open or high-resistance wiring in the enable circuit, such as a broken wire or corroded connector
  2. Faulty battery charger A assembly, including an internal short or failed control module
  3. Defective powertrain control module driver for the enable circuit, though this is less common
  4. Poor ground connection for the charger or the control module, causing a false low signal
  5. Water intrusion or corrosion at the charger connector, leading to a short to ground
  6. Aftermarket accessories improperly tapped into the enable circuit, pulling the voltage low

How to diagnose and fix it

  1. Connect a scan tool and verify P0E62 is current, then check for any related codes in other modules
  2. Inspect the enable circuit wiring and connectors for damage, corrosion, or loose pins, especially near the charger
  3. Measure voltage on the enable circuit at the charger connector with the key on and charger commanded on; compare to service information
  4. Check the charger's ground circuit for excessive resistance using a voltage drop test
  5. Disconnect the charger and see if the enable circuit voltage returns to normal, indicating an internal charger fault
  6. If the circuit tests good but the charger does not enable, follow the manufacturer's diagnostic flow to test the control module output
  7. Repair or replace the faulty wiring, connector, or charger as needed, then clear codes and verify the repair

When the charger enable circuit lies

  • A low enable circuit does not always mean the charger is bad; a chafed wire shorting to ground somewhere along the harness is a frequent culprit that gets missed.
  • Some vehicles set this code when the 12-volt auxiliary battery is simply weak, because the module sees an unexpected voltage drop during enable, so load-test the battery before condemning parts.
  • Aftermarket remote starters or alarm systems tapped into the enable wire can backfeed voltage or create a short, causing this code intermittently.
  • The enable circuit may be shared with other functions, so a fault in a seemingly unrelated module can pull the line low and set P0E62.
  • On hybrid models, the charger enable signal is often pulse-width modulated, so a standard voltmeter may show a misleading average; use a scope or duty-cycle meter for accurate diagnosis.

Can I keep driving with P0E62?

You can usually drive the vehicle short distances to a repair shop, but avoid long trips or heavy electrical loads because the auxiliary battery may not charge and could leave you stranded. If the vehicle enters limp mode or multiple warning lights appear, stop driving and seek service immediately.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

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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