#Toyota diagnostic codes 1996 code
Common mistakes when diagnosing the P0770 code However, if the solenoid is sending the correct signal range depending on throttle position, there is likely a mechanical problem with the torque converter, meaning it will have to be replaced.Īs with most transmission trouble codes, the fluid will be checked for being low or dirty. If it fails to enter lock up however, your mechanic will monitor the engine speed, road speed and throttle position to confirm the transmission isn’t locking up the torque converter.īy using a professional OBD-II scanner, your mechanic can monitor solenoid E’s signal to determine if it is working as it should. If the vehicle seems to be operating as it should, the code could be an intermittent issue. How does a mechanic diagnose the P0770 code?īecause a P0770 is related to a vehicle’s speed, your mechanic will first test drive the vehicle with the check engine light to see how severe the symptoms are.
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In others, nothing more than a check engine light will illuminate on the dash. In some cases, the transmission will shift harshly or stall the engine when idle. The most common symptoms of a P0770 include the transmission’s refusal to engage lock up, decreased fuel economy, and higher engine speeds while cruising.
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Lock up typically happens at cruising speeds when the torque converter doesn’t need to slip and to increase highway fuel economy. This controls the supply of hydraulic pressure to the lock-up clutch of the torque converter that creates a one-to-one ratio for both input and output transmission speeds. P0770 is an OBD-II generic code for a malfunction of shift solenoid E on the transmission valve body. A P0770 trouble code is related to a vehicle’s automatic transmission and the shift solenoid that controls the lock-up mechanism of the torque converter.