Rick's Free Auto Repair Advice

Posts Tagged: limp-in mode

Won’t shift out of second gear

If you own a Chrysler vehicle and it won’t shift out of second gear, read this post. If you own a Chrysler, Dodge, or Plymouth vehicle and discover that the transmission will shift from first to second gear but will not shift out of second gear, your vehicle has locked itself into “limp-in” mode. That means the computer has detected a problem with the transmission and will not allow it to shift out of second gear in order to prevent further damage to the transmission. The vehicle may shift properly … Read More

P0750 P0755 P0760 P0765 Chrysler Minivans

Fix code P0750 P0755 P0760 P0765 Chrysler Minivans The solenoid pack in these Chrysler vehicles regulates transmission oil pressure to activate the clutch packs and make the vehicle shift. The solenoid receives a pulsed signal from the PCM and the solenoid responds by opening and closing the port up to 10 times per second. This action is called “duty cycling.” So if the solenoid is open 5 times in one second, it’s at 50% duty cycle. The PCM constantly checks the condition of the solenoid pack and reports any of … Read More

P0120, P0220, P1516 – Chevrolet Tahoe 5.3L

Fix codes P0120, P0220, P1516 – Chevrolet Tahoe 5.3L Chevrolet Tahoe vehicles may experience a performance issue where they will not go over 15MPH and show trouble codes P0120, P0220, P1516. The vehicle may appear to be in “limp-in” mode, giving just enough power to get you to a shop. The codes indicate a problem with the throttle position sensor circuits and throttle actuator performance. Do NOT start replacing parts. Shops report a pattern failure in the electrical harness to these sensors. Chevrolet has issued a revised replacement harness to … Read More


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