P0607 - Control Module Performance
System
Powertrain (Engine & Gearbox)
Technical Description
The control module has detected a fault in the Control Module Performance (P0607).
Multimeter Test Points & Nominal Values
| Test Point / Component | Measurement | Nominal Target Range | Test Condition |
|---|---|---|---|
| Control Module Performance – Permanent B+ Supply | Voltage (V) | 12.4 - 12.7 V (ignition OFF) / 13.5 - 14.7 V (engine running) | At module supply pins |
| Control Module Performance – Ignition-Switched Supply | Voltage (V) | 11.8 - 14.4 V | Ignition ON |
| Control Module Performance – Ground Connections Voltage Drop | Voltage (V) | < 0.1 V per ground point | Under load to battery negative |
| Control Module Performance – 5 V Reference Outputs | Voltage (V) | 4.95 - 5.05 V per circuit | Ignition ON, sensors unplugged one at a time |
At module supply pins
Ignition ON
Under load to battery negative
Ignition ON, sensors unplugged one at a time
Oscilloscope Waveform Analysis
500 ms/div, 5 V/divPossible Causes
Control Module Performance is electrically operational but performing outside calibrated tolerance
Chafed or pinched wiring harness along the signal path to Control Module Performance
Poor ground connection or excessive voltage drop (> 0.1 V) at the ground point for Control Module Performance
Defective internal output driver or reference circuit in the control module for Control Module Performance
Symptoms
4
Recommended Solution
Verify underlying mechanical operation and rule out blockage, vacuum leaks, or mechanical binding.
Verify loaded supply voltage and harness terminal pins at Control Module Performance.
Check circuit continuity and ground-side voltage drop (< 0.05 V) for Control Module Performance.
Inspect module enclosure and connector headers for water ingress, fretting corrosion, or PCB thermal damage.
Mechanic's Tip
When facing a 5V reference supply DTC, never replace the module first. A shorted external sensor (such as A/C pressure or EGR position) drags down the shared 5V internal rail. Unplug sensors one by one until 5V recovers.