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If your GranTurismo (M145) just threw P060A and P2109 on the Bosch ME9 ECU scan, I feel you. That red diagnosis screen with “Internal Control Module Monitoring Processor Performance” and “Dy-E Fault: Uma-Learning Repeat Case Malfunction” is enough to make anyone’s heart sink.
I’ve been around these cars long enough to know this pair of codes is more common than the dealers like to admit. The good news? A lot of the time it’s fixable without instantly buying a new ECU or throttle body. Let’s break it down in plain language so you can get your GT smooth and powerful again.
What These Codes Actually Mean on the ME9
P060A = Internal Control Module Monitoring Processor Performance
The Bosch ME9 is basically telling you its own internal processor self-check failed. It’s not happy with how it’s running.
P2109 = Throttle/Pedal Position Sensor “A” Minimum Stop Performance (shown as Dy-E / Uma-Learning Repeat Case Malfunction)
The electronic throttle control can’t complete or hold its adaptive learning (the “minimum stop” position). The ECU keeps trying to relearn the throttle plate’s closed position and failing.
When they appear together on a GranTurismo, they often point to voltage, ground, or throttle-body issues that confuse the ME9.
Symptoms You’ll Feel
- Check engine light on (sometimes flashing)
- Reduced power or sudden limp mode
- Hesitation, surging, or flat throttle response
- Rough idle or stalling at lights
- Throttle feeling “dead” or delayed
- Hard starts or the car going into safe mode
- Poor fuel economy and higher emissions
In short, your beautiful Italian GT stops feeling special.
Most Common Real Causes on Maserati GranTurismo ME9
From what I’ve seen and fixed:
- Weak or failing battery / poor charging system voltage (these cars are very sensitive)
- Bad grounds or corroded power supply to the ME9 ECU
- Dirty or sticking electronic throttle body (carbon buildup is common)
- Failed throttle position / accelerator pedal position sensor or wiring
- Outdated or corrupted ME9 software
- Internal ME9 ECU fault (less common but happens)
- Aftermarket tune or incomplete throttle relearn after battery disconnect
Step-by-Step Diagnosis (Do This Order)
- Scan and record everything
- Use a good tool that reads the Bosch ME9 fully. Note freeze-frame data and any other codes.
- Battery and charging test
- Load-test the battery. Check alternator output (should be solid 13.8–14.5 V). Replace the battery if it’s more than 4–5 years old — this alone clears many P060A cases.
- Power and ground check at the ECU
- Inspect the ME9 connectors for corrosion or bent pins. Clean and dielectric-grease them. Verify all ground points (especially chassis and engine grounds) are clean and tight.
- Throttle body inspection
- Remove the intake tube and look at the throttle plate. Clean it thoroughly with proper throttle-body cleaner (do not force it open by hand). Check for smooth movement.
- Wiring and sensors
- Inspect accelerator pedal and throttle body connectors and harnesses for damage or chafing.
- Software and relearn
- Perform a full throttle adaptive relearn procedure with a capable scan tool. If the car has an old ME9 calibration, a dealer-level update often helps.
- Only then consider ECU
- If power, grounds, battery, and throttle body are perfect and the codes return immediately, the ME9 itself may need repair or replacement + coding.
Proven Fixes That Work
- New quality AGM battery + proper registration if required
- Clean all grounds and ECU power feeds
- Professional throttle body cleaning + adaptation reset
- Repair any damaged wiring
- ME9 software update at a Maserati specialist
- In stubborn cases: refurbished or new ME9 ECU (must be coded to the car)
- Accelerator pedal assembly if the pedal sensor is faulty
After any work, clear codes, do a proper drive cycle, and confirm both P060A and P2109 stay gone.
How to Stop Them Coming Back
- Keep the battery healthy and on a tender if the car sits
- Use only the correct Maserati-spec oil and do services on time
- Clean the throttle body every 30–40k miles preventatively
- Avoid cheap scan tools that can’t do full ME9 adaptations
- Address any water leaks near the ECU immediately
Why You Should Fix This Now
Ignoring P060A + P2109 can leave you stuck in limp mode, cause unexpected power loss, or eventually lead to a no-start. These GranTurismos are amazing when healthy — that Ferrari-derived V8 soundtrack and surge deserve to be enjoyed, not nursed home.