Just started this morning, doesn't seem like there is anything wrong, but the check engine light came on.
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2001 Jeep Grand Cherokee Question: What does engine code p152 mean? I have a 2001 Jeep grand cherokee
Answer #1mastertech6371 January 20, 2013, 07:18Master
P0152-2/1 O2 SENSOR SHORTED TO VOLTAGE
This symptom is diagnosed using the test P0132-1/1 O2 SENSOR SHORTED TO VOLTAGE.
With battery voltage greater than 10.4 volts , engine running for more than 4 minutes and coolant temperature above 180 °F .
The oxygen sensor voltage is above 1.5 volts .
O2 sensor operation
O2 sensor signal shorted to voltage
O2 sensor signal circuit shorted to O2 heater relay output circuit
O2 sensor signal open
O2 sensor ground circuit open