6.7L Cummins Forum

P0562-BATTERY VOLTAGE LOW

• When Monitored: With the key on or the engine running.
• Set Condition: The battery voltage detected by the ECM is less than a calibrated value.

Possible Causes
P0622 PRESENT
P2503 PRESENT
P2504 PRESENT
BATTERY TERMINAL CONNECTIONS
ACCESSORY WIRING
BATTERY
HIGH RESISTANCE IN WIRE HARNESS
ECM
INTERMITTENT CONDITION


The first thing you need to do when you see this code is to first verify the codes above don't exist and if any of the codes, P0622, P2503, P2504 are present. If they are then you must first fix them since they may be the cause for this code P0562.

If no other codes are present and you've reset the code and it's come back here's the steps to follow:



1. BATTERY TERMINAL CONNECTIONS

Visually inspect the positive and negative connections at the batteries and inspect the battery negative connections at the engine block.

If needed, repair the poor connections.

2. ACCESSORY WIRING

Check for add-on or accessory wiring at positive (+) terminal of the battery

Are there any damaged wires at the battery?

If so, repair accessory wiring.

3. BATTERY(S)

Check the Batteries for low voltage and dead cells.


Replace/recharge the weak/Bad battery or batteries.

4. HIGH RESISTANCE IN WIRE HARNESS


Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the battery terminals.
Measure the resistance from the positive and negative battery posts to the appropriate circuits in the ECM harness connector

The resistance should be less than 10 Ohms?

If not, repair the high resistance in the wire harness.

5. ECM

Reconnect the battery terminals.
Measure and record the voltage between battery positive pins of the ECM connector and the battery negative circuits of the ECM harness connector.
Reconnect the ECM harness connectors.


The readings should be within 3 volts of each other?



If not, Replace the ECM.

__________________

2007.5 Dodge Ram 3500 HD,QC, 6.7L Cummins, 6speed Auto, 4X4, Bighorn Edition.
Click for installs: Carr Steps PML Diff Cover Edge Juice with Attitude Volant Intake Hankook ATM RF10