P0607: Control Module Performance

P0607 is the general 'module not working correctly' code, used when no specific memory or processor part is named. Ford sets it for wrong instruction execution or too many processor resets in engine and transmission modules; the Ford diesel after five communication errors with its monitoring chip within 20 s (a complete loss of that link is P0600). GM introduced it in the engine module only recently: the 2025 tables evaluate the results of built-in self-tests and error-correction counters, with the lamp in the first trip. Resets can cause brief stumbling or stalling, and some systems switch to limp mode. Software updates fixed it on the Alfa Romeo Giulia 2.9 V6 and Ram 6.7 Cummins, so check bulletins first. The code alone does not say which module set it – the scan tool shows whether it is the engine, transmission, brake or body module.

Symptoms

• Check engine light on
• Limp mode or reduced power
• Brief stumbling or stalling (module reset)
• Several implausible codes at once

Most likely causes

• Faulty module software (update available)
• Internal module defect (processor, clock, monitoring chip)
• Low voltage, voltage dips or a poor ground or supply at the module
• Electrical interference, e.g. from a faulty alternator or ignition

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the battery and grounds
2. Compare the reading with other engine data while varying the engine speed.
3. Clear the code and see if it returns
4. If it is a reference voltage code, disconnect sensors one at a time and see if the voltage recovers
5. Check whether a software update is available
6. Do not replace the control module without a full diagnosis

Good to know

• Repair difficulty: hard
• It can trigger limp mode.
• It affects emissions.

What each character of P0607 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• 6: Control modules and outputs
• 07: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0607?

It depends on the symptoms. If the car is running normally you can go to a repair shop; if it goes into limp mode, drive as little as possible.

What causes code P0607?

The most common causes are: faulty module software (update available); internal module defect (processor, clock, monitoring chip); low voltage, voltage dips or a poor ground or supply at the module.

Related codes

• P0606Control Module Processor
• P0600Serial Communication Link
• P060AInternal Control Module Monitoring Processor Performance
• P0604Internal Control Module Random Access Memory (RAM) Error
• P0613TCM Processor

Sources

• law.cornell.edu: 13 CCR 1968.2
• newtonnet.co.uk: fordobd2012
• fordservicecontent.com: obd summary diesel 2023
• gsi.ext.gm.com: 25OBDG03A

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.