Hello,
My 1998 LS 400 (177k miles) intermittently gives me these codes and turns off the VSC:
P1346 (Variable Valve Timing Sensor Bank 1 Range/Performance Problem)
P1351 (Variable Valve Timing Sensor Range/Performance Problem Bank 2)
P1346 P
P1351 P
On the possibility that the problem is the sensors or actuators being clogged with dirty oil, my mechanic did a hot oil engine clean, then I put 1/2 can of Seafoam into the engine oil.
After I reset/clear the codes with a code reader, the car works fine for anywhere from 5 miles to 20 miles, then the check engine light comes on again and the VSC turns off.
Any advice on how to diagnose this, to determine if it's just the sensors or if it's a deeper problem?
My 1998 LS 400 (177k miles) intermittently gives me these codes and turns off the VSC:
P1346 (Variable Valve Timing Sensor Bank 1 Range/Performance Problem)
P1351 (Variable Valve Timing Sensor Range/Performance Problem Bank 2)
P1346 P
P1351 P
On the possibility that the problem is the sensors or actuators being clogged with dirty oil, my mechanic did a hot oil engine clean, then I put 1/2 can of Seafoam into the engine oil.
After I reset/clear the codes with a code reader, the car works fine for anywhere from 5 miles to 20 miles, then the check engine light comes on again and the VSC turns off.
Any advice on how to diagnose this, to determine if it's just the sensors or if it's a deeper problem?