U0293

Lost Communication With Hybrid Powertrain Control Module

Car Fault Codes Network

Can you still drive? With care, short trips only

Who can fix it? Needs a specialist or dealer

Typical repair time 30 minutes – 5 hours

Typical cost SAR 100 to 6,000

What it means

On hybrid vehicles, the hybrid powertrain control module coordinates the engine, the electric motor and the high-voltage battery. This code is set in another module when messages from this module stop arriving over the network. The vehicle may enter limp mode or fail to reach ready-to-drive mode.

Symptoms4

Check engine light and hybrid system warning light on.
Vehicle does not enter ready mode or does not start.
Reduced power or limp mode.
Several warning lights at once and the scan tool cannot reach the module.

Possible causes6

Weak or loose 12-volt low-voltage battery.
Blown module power fuse or a faulty relay.
Poor module ground or a corroded connector.
Open or shorted network wiring.
Water in the module or its connector.
Internal module failure.

How to diagnose5

Check the low-voltage battery and measure its voltage, since it powers the control modules on a hybrid.
Read codes from all modules and note which ones lost contact with the hybrid module.
Try to connect directly to the module with a scan tool; if it does not respond, check its fuse, relay, power and ground.
Measure the network line resistance and compare it with the manufacturer specification.
Inspect the module connector for water or corrosion without touching any part of the high-voltage circuit (orange cables).

How to fix5

Charge or replace the low-voltage battery and clean its terminals.
Replace the faulty fuse or relay.
Repair the ground, connector or network wiring.
Replace and program the module if proven faulty with good power and network wiring.
Clear codes in all modules, confirm the vehicle reaches ready mode and the code does not return.

Repair cost

0–500

500–2,000

2,000–5,000

5,000+

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low for a low-voltage battery or a fuse, and reaches the upper end if the module must be replaced and programmed at a hybrid specialist.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions

Could the high-voltage battery be the cause?

Usually not. This code is about communication with the module, and the most common causes are the low-voltage battery, power supply or wiring. High-voltage battery codes such as P0A80 point to a different problem.

Can any workshop fix this?

Any workshop can check the battery and fuses, but work near the high-voltage circuit needs a technician trained on hybrids with proper insulated tools.

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This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

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