Control Module Processor

What it means

The engine computer (ECU) detected a processor fault during its self-test, such as the main processor and the monitoring processor disagreeing. On vehicles with an electronic throttle, the computer may limit power or enter limp mode for safety.

Related codes: P0607P0601P2135P0562P0600

Symptoms4

• Check engine light on, possibly with a throttle warning or reduced power message.
• Limp mode with the engine unwilling to rev.
• Sudden stalling or hesitation.
• Hard starting or no start in some cases.

Possible causes5

• Weak battery or low or unstable supply voltage.
• Poor ground connections for the computer.
• A known software issue fixed by a manufacturer update.
• Moisture or corrosion in the computer connectors.
• Internal processor failure in the engine computer.

How to diagnose5

1. Test the battery and charging system, since low voltage is one of the most common causes of this code.
2. Measure voltage drop on the computer power and ground circuits while running.
3. Inspect the computer connectors for water or corrosion.
4. Look for a service bulletin or software update for this code.
5. Clear the code and see whether it returns after power and grounds are fixed.

How to fix5

1. Charge or replace the battery, and repair a weak charging system.
2. Clean and tighten ground points and connectors.
3. Update the engine computer software if an update exists.
4. Replace and program the engine computer if the code returns with all of the above in good order.
5. Clear the codes, road test and confirm the code does not return.

Repair cost

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

The cost is low for a battery, ground or software update, and rises sharply if the computer must be replaced and programmed.

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