Stuck in Gear 1
Transmission stuck in first gear or unable to complete the requested shift.
View fault →Brake-pressure and brake-light switch signals do not agree in the expected sequence/state.
Record available · guide under review →Brake-system logic reports an issue involving the brake recognition switch/booster pathway associated with F84.
Record available · guide under review →This fault code is stored by the control module responsible for abs / brake electronics when it detects a problem on the circuit for the Vacuum System for Brakes (component). The logged condition is: code-specific malfunction detected.
Record available · guide under review →Transmission stuck in first gear or unable to complete the requested shift.
View fault →Turbocharger or supercharger boost pressure is lower than expected.
View fault →Exhaust-gas recirculation flow is below the expected value.
View fault →Diesel particulate-filter efficiency is below the monitored threshold.
View fault →Random or multiple-cylinder misfire has been detected.
View fault →The engine is running too lean on Bank 1.
View fault →Fault codes show where to look, not what to replace. For the right outcome, read the symptoms, run diagnostic checks, identify the vehicle and confirm exact part numbers before purchase.