Diagnostic Trouble Code Identification. Buick Regal (China) (CNG) 1999

For 1990-2009 cars only

Makes 🢒 Buick 🢒 1999 🢒 Regal (China) (CNG) 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Diagnostic Trouble Code Identification

Diagnostic Trouble Code Identification (1999 W Buick China 4T65-E)

DTC

Description

DTC Type

Default Action

P0218

Transmission Fluid Overtemperature

Freezes shift adapts

P0502

Vehicle Speed Sensor Circuit -- Low Input

•	Maximum line pressure

•	The PCM calculates vehicle speed from ISS and commanded gear

•	Freezes shift adapts

P0503

Vehicle Speed Sensor Circuit -- Intermittent

•	Maximum line pressure

•	The PCM calculates vehicle speed from ISS and commanded gear

•	Freezes shift adapts

P0711

Transmission Fluid Temperature Sensor Circuit -- Range/Performance

•	The PCM calculates a default TFT from the ECT and the IAT.

•	Freezes shift adapts

P0712

Transmission Fluid Temperature Sensor Circuit -- Low Input

•	The PCM calculates a default TFT from the ECT and the IAT.

•	Freezes shift adapts

P0713

Transmission Fluid Temperature Sensor Circuit -- High Input

•	The PCM calculates a default TFT from the ECT and the IAT.

•	Freezes shift adapts

P0716

Input Speed Sensor Circuit -- Intermittent

•	Inhibit TCC

•	Inhibit 4th gear in Hot Mode

•	Freezes shift adapts

P0717

Input Speed Sensor Circuit -- Low Input

•	Inhibit TCC

•	Inhibit 4th gear in Hot Mode

•	Freezes shift adapts

P0719

Brake Switch Circuit -- Low Input

Disregard brake switch input for TCC operation

P0724

Brake Switch Circuit -- High Input

None

P0730

Incorrect Gear Ratio

•	Maximum line pressure

•	Freezes shift adapts

P0741

Torque Converter Clutch System -- Stuck OFF

•	Inhibit TCC

•	Inhibit 4th gear in Hot Mode

•	Freezes shift adapts

P0742

Torque Converter Clutch System -- Stuck ON

•	TCC commanded ON at maximum capacity

•	Freezes shift adapts

P0748

Pressure Control Solenoid Circuit -- Electrical

•	Maximum line pressure

•	Freezes shift adapts

P0751

1-2 Shift Solenoid Valve -- Performance

•	Maximum line pressure

•	Inhibit 3-2 downshifts when the vehicle speed is greater than 48 km/h (30 mph)

•	Freezes shift adapts

P0753

1-2 Shift Solenoid Circuit -- Electrical

•	Maximum line pressure

•	Inhibit 3-2 downshifts when the vehicle speed is greater than 48 km/h (30 mph)

•	Freezes shift adapts

P0756

2-3 Shift Solenoid Valve -- Performance

•	Maximum line pressure

•	Inhibit TCC

•	Default to 3rd gear

•	Freezes shift adapts

P0758

2-3 Shift Solenoid Circuit -- Electrical

•	Maximum line pressure

•	Inhibit TCC

•	Default to 3rd gear

•	Freezes shift adapts

P1810

Transmission Fluid Pressure Manual Valve Position Switch Assembly Circuit Malfunction

•	Maximum line pressure

•	The PCM assumes D4 for shifting

•	Freezes shift adapts

P1811

Maximum Adapt and Long Shift

•	Maximum line pressure

•	Freezes shift adapts

P1860

Torque Converter Clutch Pulse Width Modulation Solenoid Circuit -- Electrical

•	Inhibit TCC

•	Inhibit 4th gear in Hot Mode

•	Freezes shift adapts

P1887

Torque Converter Clutch Release Switch Circuit Malfunction

•	Inhibit TCC

•	Inhibit 4th gear in Hot Mode

•	Freezes shift adapts

DTC Types

•	A -- Emission-related, turns the MIL ON after the first failure.

•	B -- Emission-related, turns the MIL ON during the second consecutive trip with failure.

•	D -- Non-emission-related, no lamps.