Dodge 2001 Ram 1500 Owner's Manual page 2799

25 - 12 EMISSIONS CONTROL
EMISSIONS CONTROL (Continued)
(M) Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was recorded
(depending if required by CARB and/or EPA). MIL is displayed as an engine icon on instrument panel.
Generic Scan
Tool P-Code
P1482 Catalyst Temperature Sensor Circuit
P1483 Catalyst Temperature Sensor Circuit
P1484 Catalytic Converter Overheat
P1485 Air Injection Solenoid Circuit
P1486 Evap Leak Monitor Pinched Hose
P1487 Hi Speed Rad Fan CTRL Relay
P1488 Auxiliary 5 Volt Supply Output Too
P1488 5 Volt Supply Voltage Low
P1489 High Speed Fan CTRL Relay Circuit
P1490 Low Speed Fan CTRL Relay Circuit
P1491 Rad Fan Control Relay Circuit
P1492 Ambient/Batt Temp Sen Volts Too
P1492 (M) Ambient/Batt Temp Sensor Volts Too
P1493 (M) Ambient/Batt Temp Sen Volts Too
P1493 (M) Ambient/Batt Temp Sen Volts Too
P1494 (M) Leak Detection Pump Sw or
P1495 Leak Detection Pump Solenoid
P1496 5 Volt Supply, Output Too Low
P1498 High Speed Rad Fan Ground CTRL
P1499 Hydraulic cooling fan solenoid circuit
P1594 (G) Charging System Voltage Too High
P1594 Charging System Voltage Too High
(G) Generator lamp illuminated
DRB Scan Tool Display
Shorted Low
Shorted High.
Detected
Found
Circuit
Low
High
High
Low
Low
Mechanical Fault
Circuit
Rly Circuit
Brief Description of DTC
Catalyst temperature sensor circuit shorted low.
Catalyst temperature sensor circuit shorted high.
A catalyst overheat condition has been detected by the
catalyst temperature sensor.
An open or shorted condition detected in the air assist
solenoid circuit.
LDP has detected a pinched hose in the evaporative hose
An open or shorted condition detected in the control
circuit of the #2 high speed radiator fan control relay.
Auxiliary 5 volt sensor feed is sensed to be below an
acceptable limit.
Sensor supply voltage for ECM sensors is too low.
An open or shorted condition detected in the control
circuit of the high speed radiator fan control relay.
An open or shorted condition detected in control circuit of
the low speed radiator fan control relay.
An open or shorted condition detected in the radiator fan
control relay control circuit. This includes PWM solid state
External temperature sensor input above acceptable
Battery temperature sensor input voltage above an
acceptable range.
External temperature sensor input below acceptable
Battery temperature sensor input voltage below an
acceptable range.
Incorrect input state detected for the Leak Detection
Pump (LDP) pressure switch.
An open or shorted condition detected in the Leak
Detection Pump (LDP) solenoid circuit.
5 volt sensor feed is sensed to be below an acceptable
limit. ( less than 4v for 4 sec )
An open or shorted condition detected in the control
circuit of the #3 high speed radiator fan control relay.
An open or shorted condition detected in the cooling fan
control solenoid circuit.
Battery voltage sense input above target charging voltage
during engine operation.
Battery voltage sense input above target charging voltage
during engine operation.
system.
relays.
voltage.
voltage.
BR/BE