Cause
Blown fuse or failed supply
Simple, cheap, and worth eliminating before anything else. A fuse rarely fails from age — it failed because something drew more current than it was rated for, so a fuse that blows again immediately is reporting a short rather than being faulty itself.
Typically an easy fix. Often worth checking before paying anyone to look.
Some of these codes mean you should stop driving
23 of the 216 codes this can cause indicate a fault where continuing to drive risks damage or is unsafe. Which one you have matters more than the cause does — read the code's own page before deciding.
Codes this can cause (216)
Codes where this is a likely explanation first, rather than merely a possible one.
- P0931 Gear Shift Lock Solenoid/Actuator Control Circuit A High Likely for this code Moderate
- P0948 Hydraulic Pump Relay/Control Circuit High Likely for this code High
- P0A07 Motor Electronics Coolant Pump A Control Circuit High Likely for this code High
- P0BBF Hybrid/EV Battery Pack Cooling Fan Supply Voltage Circuit/Open Likely for this code High
- P0C4B Hybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit/Open Likely for this code High
- P0C4C Hybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit Low Likely for this code Moderate
- P0C4D Hybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit High Likely for this code Moderate
- P0D6D Air Conditioning Compressor Motor Voltage A Low Likely for this code Moderate
- P0E0F Generator Inverter Power Supply A Circuit/Open Likely for this code High
- P0E10 Generator Inverter Power Supply A Circuit Low Likely for this code High
- P0E11 Generator Inverter Power Supply A Circuit High Likely for this code High
- P2062 Reductant/Regeneration Supply Control Circuit/Open Likely for this code Moderate
- P2207 NOx Sensor Heater Control Circuit High Bank 1 Sensor 1 Likely for this code High
- P2220 NOx Sensor Heater Control Circuit High Bank 2 Likely for this code High
- P2313 Ignition Coil E Primary Control Circuit High Likely for this code Stop driving High
- P2505 Engine Control Module Power Input Signal Likely for this code High
- P2600 Coolant Pump A Control Circuit/Open Likely for this code High
- P2603 Coolant Pump A Control Circuit High Likely for this code High
- P2A32 AFCM Power Relay Control Circuit/Open Likely for this code High
- P2A33 AFCM Power Relay Control Circuit Low Likely for this code High
- P2A34 AFCM Power Relay Control Circuit High Likely for this code High
- P2A35 AFCM Power Relay Sense Circuit Likely for this code High
- P2A36 AFCM Power Relay Sense Circuit Low Likely for this code High
- P2A37 AFCM Power Relay Sense Circuit High Likely for this code High
- P2AB2 Catalyst Heater Control Module Supply Voltage Likely for this code Moderate
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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