Corroded, loose, or damaged wiring or connectors in the negative contactor circuit; Failed negative contactor coil or internal contactor mechanism; Faulty control module driver that commands the contactor; Blown fuse or fusible link protecting the contactor circuit; High resistance ground connection for the contactor or control module; Water intrusion or physical damage to the contactor or its connector; Aftermarket accessories improperly wired into the charging system circuit

DTC codes / P2Dxx · Hybrid propulsion / P2D62

P2D62Battery Charging System Negative Contactor C Circuit

Q: What does code P2D62 mean?

Battery Charging System Negative Contactor C Circuit. P2D62 indicates that the battery charging system's negative contactor circuit has a fault, as detected by the control module monitoring the contactor's electrical path. The computer expects a specific voltage or current signature when the contactor is commanded open or closed, and it has seen a value outside the acceptable range, signaling a problem in the circuit or the contactor itself.

P2D62 indicates that the battery charging system's negative contactor circuit has a fault, as detected by the control module monitoring the contactor's electrical path. The computer expects a specific voltage or current signature when the contactor is commanded open or closed, and it has seen a value outside the acceptable range, signaling a problem in the circuit or the contactor itself.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

Illumination of the battery warning light or service vehicle soon message on the dashboard
Often no symptoms besides the warning light, especially if the fault is intermittent
Difficulty starting the engine or a slow crank due to a partially engaged contactor
Battery that repeatedly discharges or fails to hold a charge
Electrical accessories behaving erratically or dimming lights
In rare cases, a no-start condition if the contactor fails to close

Common causes, most likely first

Corroded, loose, or damaged wiring or connectors in the negative contactor circuit
Failed negative contactor coil or internal contactor mechanism
Faulty control module driver that commands the contactor
Blown fuse or fusible link protecting the contactor circuit
High resistance ground connection for the contactor or control module
Water intrusion or physical damage to the contactor or its connector
Aftermarket accessories improperly wired into the charging system circuit

How to diagnose and fix it

Perform a visual inspection of the negative contactor, its connectors, and associated wiring for corrosion, looseness, or damage
Check all fuses and fusible links related to the charging system and contactor circuit
Measure resistance and voltage drop across the negative contactor circuit to identify excessive resistance
Test the contactor coil for proper resistance and verify it actuates when commanded by the control module
Inspect and clean ground connections for the contactor and control module
Use a scan tool to command the contactor on and off while monitoring circuit voltage or current to confirm operation
If the circuit and contactor test good, diagnose the control module for a faulty driver or internal fault

Don't overlook the negative contactor ground

A poor ground connection at the contactor or control module is a frequently missed cause of this code, as it can mimic a failed contactor.
The code can set intermittently due to vibration or temperature changes, so a wiggle test of the harness while monitoring live data is often necessary.
A weak or failing battery can cause voltage spikes that trigger this code, so always load-test the battery before replacing expensive components.
Aftermarket alarms or audio equipment tapped into the charging system wiring can introduce resistance or feedback that sets this code.
The negative contactor is sometimes part of the battery management system, and a fault here may also set codes in other modules, so check all systems for related faults.

Can I keep driving with P2D62?

If the vehicle starts and runs normally, you can drive it to a repair shop, but avoid long trips and heavy electrical loads. If the battery warning light is on and the battery is not charging, limit driving to short distances to prevent a no-start situation.

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.