P0D59

What it means

P0D59 means Proximity Detection Circuit A High. The control unit monitoring the proximity signal, which on plug-in hybrids and electric vehicles is normally the charge connector detection line, saw a voltage higher than the expected range. The exact circuit, its location and its voltage limits vary by model, so check the manufacturer's data for the vehicle.

Symptoms

• Warning light on, or a charging system or service message on the dash
• Vehicle will not start charging, or charging stops soon after it begins
• Charge port lock or indicator light behaves oddly or not at all
• Charging works with one cable or charge point but not another
• Reduced or limited electric-only driving, depending on the model

Possible causes

• Corroded, dirty, wet or damaged pins in the charge inlet affecting the proximity signallikely
• Wiring fault on the proximity circuit, such as a short to voltage or a chafed wire touching a powered circuitlikely
• Poor connection or pin damage in a connector on the proximity circuit, giving a high-voltage readingpossible
• Faulty proximity switch or resistor in the charge inlet or charging cable plugpossible
• Faulty charging cable or charge point sending an out-of-range proximity signalpossible
• Internal fault in the charger or charge control modulerare
• Outdated control unit software, only where the manufacturer lists it as a known cause for this faultrare

How to diagnose

1. Read all stored and pending codes and the freeze frame data, noting whether the vehicle was plugged in and charging when the fault set.
2. Try a different charging cable and charge point to rule out the external equipment.
3. Look inside the charge inlet and at the plug for moisture, debris, corrosion, bent pins, heat marks or a damaged latch or switch.
4. Check the wiring and connectors between the charge inlet and the control module for chafing, water ingress, pushed-back pins and signs of a short to power.
5. Using the manufacturer's wiring diagram and voltage specification, measure the proximity circuit voltage with the plug connected and disconnected.
6. Check the circuit for a short to voltage and for continuity and resistance, with the circuit isolated as the procedure instructs.
7. Check the control module's power and earth supplies and for any related software updates or service bulletins for the model.
8. Clear the code after the repair and retest by charging the vehicle to confirm it does not return.

How to fix

• Clean or replace a contaminated or damaged charge inlet and fix any source of water ingress.
• Repair or replace damaged wiring and terminals on the proximity circuit.
• Reseat, repair or replace faulty connectors on the circuit.
• Replace the charge inlet or proximity switch assembly if its signal is out of specification.
• Replace a faulty charging cable, or report a fault with the charge point to its operator.
• Replace or update the charge control module only after wiring and inlet faults are ruled out and the manufacturer's procedure confirms it.

Can I keep driving?

Nearby codes

• P0D58GenericProximity Detection Circuit A Low
• P0D5AGenericProximity Detection Circuit A Intermittent/Erratic