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1999 Jeep Grand Cherokee Laredo 4.7L MIL Lamp on
Posted to Chrysler Driveability on 4/17/2006 7 Replies

Car came to us with SES Light on. Had it checked at Auto Zone, told TPS Sensor code. In the past year the customer has replaced TPS several times. Light comes back on after a few days. We cleared codes and immediately came back with PO123 code. We have tested ...

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car Vehicle Data

1999 Jeep Grand Cherokee Laredo

VIN 1J46W68N7X
Engine4.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On

Trouble Codes

P0123Throttle Position Sensor Circuit High Voltage
P0320No Crank Reference Signal To PCM
P1596Speed Control Switch Always High
Message Closed

car Vehicle Data

1999 Jeep Grand Cherokee Laredo

VIN 1J46W68N7X
Engine4.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On

Trouble Codes

P0123Throttle Position Sensor Circuit High Voltage
P0320No Crank Reference Signal To PCM
P1596Speed Control Switch Always High