P0A1D fault code: what it means

P0A1D: Haval hybrid: hybrid/EV powertrain control module fault.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

control module
12V supply
software

P0A1D by make

Haval

Haval hybrid: hybrid/EV powertrain control module fault.

Usual causes: control module; 12V supply; software

Lexus

Hybrid powertrain control module (HV ECU) fault on a Lexus hybrid. Read the information (sub) code with a Lexus-capable scan tool.

Usual causes: weak 12 V battery or poor earth; HV ECU internal fault; water damage or corroded connectors

MG

MG EV/PHEV: hybrid/EV powertrain control module fault.

Usual causes: control module; 12V supply; software

Toyota

Hybrid powertrain control module (HV ECU) fault: the hybrid ECU has found an internal or supply problem. Read the information (sub) code with Techstream.

Usual causes: weak 12 V battery or poor earth giving low supply voltage; HV ECU internal fault; water damage or corroded ECU connectors

What the repair usually costs

Water damage dry-out (carpet lift, dry, sanitise)NZ$460–NZ$1,390 · A$500–A$1,480

Not sure what P0A1D means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.