Download EMISSION CONTROL SYSTEMS - cycle

EMISSION CONTROL SYSTEMS
TJ
25 - 5
DESCRIPTION AND OPERATION (Continued)
Hex
Code
Generic
Scan
Tool
Code
DRB Scan Tool Display
Description of Diagnostic Trouble Code
52
S/C Power Relay Circuit
Malfunction detected with power feed to speed
control servo solenoids.
57
Speed Control Switch Always Low
Speed control switch input below the minimum
acceptable voltage.
65
Fuel Pump Relay Control Circuit
An open or shorted condition detected in the fuel
pump relay control circuit.
Upstream O2 Sensor Slow
Response
Upstream oxygen sensor response slower than
minimum required switching frequency.
Upstream O2 Sensor Heater
Failure
Upstream oxygen sensor heating element circuit
malfunction
*66
P0133
or
*67
P0135
or
*69
P0141
Downstream O2 Sensor Heater
Failure
Downstream oxygen sensor heating element circuit
malfunction
*6A
P0300
Multiple Cylinder Misfire
Misfire detected in multiple cylinders.
Cylinder #1 Misfire
Misfire detected in cylinder #1.
Cylinder #2 Misfire
Misfire detected in cylinder #2.
Cylinder #3 Misfire
Misfire detected in cylinder #3.
or
*6B
P0301
or
*6C
P0302
or
*6D
P0303
or
*6E
P0304
Cylinder #4 Misfire
Misfire detected in cylinder #4.
*70
P0420
Catalytic Converter Efficency
Failure
Catalyst efficiency below required level.
*71
P0441
Evap Purge Flow Monitor Failure
Insufficient or excessive vapor flow detected during
evaporative emission system operation.
*72
P1899
Park/Neutral Switch Failure
Incorrect input state detected for the Park/Neutral
switch, auto. trans. only.
*73
P0551
Power Steering Switch Failure
Power steering high pressure seen at high speed
(2.5L only).
*76
P0172
Fuel System Rich
A rich air/fuel mixture has been indicated by an
abnormally lean correction factor.
*77
P0171
Fuel System Lean
A lean air/fuel mixture has been indicated by an
abnormally rich correction factor.
*7E
P0138
Downstream O2 Sensor Shorted to
Voltage
Downstream oxygen sensor input voltage
maintained above the normal operating range.
*80
P0125
Closed Loop Temp Not Reached
Engine does not reach 20°F within 5 minutes with a
vehicle speed signal.
*84
P0121
TPS Voltage Does Not Agree With
MAP
TPS signal does not correlate to MAP sensor
*87
P1296
No 5 Volts To MAP Sensor
5 Volt output to MAP sensor open
*8A
P1294
Target Idle Not Reached
Actual idle speed does not equal target idle speed.