P0D59 on 2014-2015 Cadillac ELR — Proximity Detection Circuit "A" High
1 vehicles · 1 makes
Most Reported On
P0D59 is an OBD-II diagnostic trouble code meaning “Proximity Detection Circuit "A" High.” An EV/plug-in-hybrid charging code documented in Mitsubishi PHEV service information and widely reported on GM plug-ins (Chevrolet Volt). The "proximity detection" circuit is the SAE J1772 proximity pilot signal that tells the vehicle a charge cable is physically latched into the charge port; the charging/on-board charger control module sets this code when it sees abnormally high voltage on that circuit. The monitor generally runs when the vehicle is NOT plugged in and charging. In practice the vehicle may refuse to start a charge session, may not recognize or release the connector, or may display a charging fault message. It does not affect driving on the existing state of charge, but it can leave you unable to recharge. Reported real-world fixes most often involve the charge port inlet connector. This code is most commonly reported on 2014-2015 Cadillac ELR.
Common Causes
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P0D59.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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FAQ
What does P0D59 mean?
P0D59 stands for "Proximity Detection Circuit "A" High." An EV/plug-in-hybrid charging code documented in Mitsubishi PHEV service information and widely reported on GM plug-ins (Chevrolet Volt). The "proximity detection" circuit is the SAE J1772 proximity pilot signal that tells the vehicle a charge cable is physically latched into the charge port; the charging/on-board charger control module sets this code when it sees abnormally high voltage on that circuit. The monitor generally runs when the vehicle is NOT plugged in and charging. In practice the vehicle may refuse to start a charge session, may not recognize or release the connector, or may display a charging fault message. It does not affect driving on the existing state of charge, but it can leave you unable to recharge. Reported real-world fixes most often involve the charge port inlet connector.
What are the most common causes of P0D59?
The most common causes of P0D59 are: Dirty, corroded, or damaged charge port (inlet) contacts, Faulty proximity/latch switch in the charge port inlet assembly, Damaged or worn EVSE charging cable connector, Open or high-resistance wiring between the charge port and the charging control module, Poor ground or spread connector terminals at the charger module, Failed on-board charger / charge control module. The specific cause varies by vehicle.
How much does it cost to fix P0D59?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0D59?
Au7o has documented P0D59 across 1 vehicle models from 1 manufacturers: Cadillac.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.