EEC, Control unit for exhaust gas aftertreatment
â–¶ How to fix
Proceed as follows: Measure the supply voltage to EEC.Check other fault codes. A fault in another control unit may result in the supply voltage to EEC being too high.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The battery voltage to EEC is too high. The voltage must not exceed 36V.
Possible cause
An electrical fault, for example a fault on the alternator.