Suzuki Forenza, Reno 2003-06

2.0L L4 - Std 2

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Trouble Code: P0442



EVAP System Leak Detected (small leak)

Possible Causes:



Canister air valve (solenoid) is damaged or has failed
 
Charcoal canister is clogged, loaded with fuel or moisture
 
Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
Fuel tank pressure sensor is damaged or has failed
 
Fuel tank or fuel tank sender assembly 'O' ring is leaking
 
Fuel tank vapor line(s) blocked, damaged or disconnected
 
Tank pressure control solenoid is contaminated or damaged
 
Purge solenoid control circuit is open or shorted to ground
 
Purge solenoid power circuit is open (test FI fuse in relay box)
 
Purge solenoid is contaminated, damaged or has failed
 
PCM has failed
 

Trouble Code: P0443



EVAP Canister Purge Solenoid Circuit Malfunction

Possible Causes:



Purge solenoid control circuit is open or shorted to ground
 
Purge solenoid power circuit is open (check IG fuse in the J/B)
 
Purge solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0449



EVAP Canister Control System Vent Control Valve/Solenoid Circuit Malfunction

Possible Causes:



Purge solenoid control circuit is open or shorted to ground
 
Purge solenoid power circuit is open (check IG fuse in the J/B)
 
Purge solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0452



EVAP Pressure Sensor Low Input

Possible Causes:



Pressure sensor signal circuit is open or shorted to ground
 
Pressure sensor signal is shorted to VREF or system power
 
Pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0453



EVAP Pressure Sensor High Input

Possible Causes:



Pressure sensor signal circuit is open or shorted to ground
 
Pressure sensor signal is shorted to VREF or system power
 
Pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0455



EVAP System Large Leak (0.080") Detected

Possible Causes:



Canister vent (CV) solenoid is stuck open
 
EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
 
EVAP canister purge valve stuck closed, or canister damaged
 
Fuel filler cap missing, loose (not tightened) or the wrong part
 
Fuel vapor hoses/tubes blocked or restricted, or fuel vapor control valve tube or fuel vapor vent valve assembly blocked
 
Fuel tank pressure (FTP) sensor has failed (mechanical fault)
 
Fuel tank control valve is contaminated, damaged or has failed
 

Trouble Code: P0456



EVAP System Small Leak (0.080") Detected

Possible Causes:



Canister vent (CV) solenoid is stuck open
 
EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
 
EVAP canister purge valve stuck closed, or canister damaged
 
Fuel filler cap missing, loose (not tightened) or the wrong part
 
Fuel vapor hoses/tubes blocked or restricted, or fuel vapor control valve tube or fuel vapor vent valve assembly blocked
 
Fuel tank pressure (FTP) sensor has failed (mechanical fault)
 
Fuel tank control valve is contaminated, damaged or has failed
 

Trouble Code: P0461



Fuel Level Sensor Performance

Possible Causes:



Fuel tank empty or overfull (fuel sender is stuck mechanically)
 
Wrong fuel gauge is installed, or instrument panel is damaged
 
Fuel gauge sender unit is damaged or has failed
 
PCM has failed
 

Trouble Code: P0462



Fuel Level Sensor Circuit Low Input

Possible Causes:



Fuel level signal circuit is open between the splice and the I/P
 
Wrong fuel gauge is installed, or instrument panel is damaged
 
Fuel gauge sender unit is damaged or has failed
 
PCM has failed
 

Trouble Code: P0463



Fuel Level Sensor Circuit High Input

Possible Causes:



Fuel level signal circuit is open between the splice and the I/P
 
Wrong fuel gauge is installed, or instrument panel is damaged
 
Fuel gauge sender unit is damaged or has failed
 
PCM has failed
 

Trouble Code: P0464



Fuel Level Sensor Circuit Intermittent

Possible Causes:



Fuel level signal circuit is open between the splice and the I/P
 
Wrong fuel gauge is installed, or instrument panel is damaged
 
Fuel gauge sender unit is damaged or has failed
 
PCM has failed
 

Trouble Code: P0488



Exhaust Gas Recirculation Closed Valve Pintle Error

Possible Causes:



EGR stepper motor control circuit(s) open or shorted to ground
 
EGR stepper motor assembly is damaged or has failed
 
Exhaust connection to EGR valve is clogged or restricted
 
Catalytic converter or exhaust system is clogged or restricted
 
PCM has failed
 

Trouble Code: P0502



Vehicle Speed Sensor Circuit No Signal (Engine Side)

Possible Causes:



VSS signal circuit is open or shorted to ground
 
VSS ground circuit is open
 
VSS signal circuit from Combo Meter open or shorted to ground
 
VSS is damaged or has failed (drive gear may be damaged)
 
PCM has failed
 
TSB TS4-23 (6/96) contains information related to this code
 

Trouble Code: P0506



Idle Speed Control System Lower Than Expected

Possible Causes:



IAC valve control circuit is open or shorted to ground
 
IAC valve power circuit is open (intermittent fault)
 
IAC valve ground circuit is open (intermittent fault)
 
Throttle plate is carbon fouled (it may need to be cleaned)
 
PCM has failed
 

Trouble Code: P0507



Idle Speed Control System Higher Than Expected

Possible Causes:



IAC valve control circuit is open (intermittent fault)
 
IAC valve power circuit is open (intermittent fault)
 
IAC valve ground circuit is open (intermittent fault)
 
Throttle plate is carbon fouled (it may need to be cleaned)
 
PCM has failed
 

Trouble Code: P0532



A/C Pressure Sensor Low Voltage

Possible Causes:



Sensor signal circuit is open or shorted to ground
 
Sensor ground circuit is open
 
Sensor is damaged or has failed (drive gear may be damaged)
 
PCM has failed
 

Trouble Code: P0533



A/C Pressure Sensor High Voltage

Possible Causes:



Sensor signal circuit is open or shorted to ground
 
Sensor ground circuit is open
 
Sensor is damaged or has failed (drive gear may be damaged)
 
PCM has failed
 

Trouble Code: P0562



System Voltage Too Low (Engine Side)

Possible Causes:



There is a signal circuit open or shorted to ground
 
There is a ground circuit is open
 
Check the battery voltage
 
PCM has failed
 

Trouble Code: P0563



System Voltage Too High (Engine Side)

Possible Causes:



There is a signal circuit open or shorted to ground
 
There is a ground circuit is open
 
Check the battery voltage
 
PCM has failed
 

Trouble Code: P0601



PCM Memory Check Sum Error

Possible Causes:



Clear the trouble code, and recheck for the same code.
 
If this trouble code resets, the PCM must be replaced
 

Trouble Code: P0602



ECM Memory Error

Possible Causes:



The contents of the ECM have changed
 
Clear the trouble code, and recheck for the same code.
 
If this trouble code resets, the ECM must be replaced
 

Trouble Code: P1111



Intake Air Temperature Intermittent Low Voltage

Possible Causes:



IAT sensor signal circuit has high resistance
 
IAT sensor ground circuit has high resistance
 
IAT sensor is contaminated, damaged or has failed
 
PCM has failed
 

Trouble Code: P1112



Intake Air Temperature Intermittent High Voltage

Possible Causes:



IAT sensor signal circuit is shorted to sensor ground
 
IAT sensor signal circuit is shorted to chassis ground
 
IAT sensor is damaged or has failed (it may be shorted)
 
PCM has failed
 

Trouble Code: P1114



Engine Coolant Temperature Sensor Circuit Intermittent Low

Possible Causes:



ECT sensor signal circuit is shorted to sensor ground
 
ECT sensor signal circuit is shorted to chassis ground
 
ECT sensor is damaged or has failed (it may be shorted)
 
PCM has failed
 

Trouble Code: P1115



Engine Coolant Temperature Sensor Circuit Intermittent High

Possible Causes:



ECT sensor signal circuit is open between sensor and the PCM
 
ECT sensor signal circuit is shorted to VREF or system power
 
ECT sensor ground circuit is open between sensor and PCM
 
ECT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1121



Throttle Position Sensor Intermittent High Voltage

Possible Causes:



MAF sensor or TP sensor ground circuit has high resistance
 
MAF sensor or TP sensor is out-of-calibration
 
TP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1122



Throttle Position Sensor Intermittent Low Voltage

Possible Causes:



TP sensor signal circuit is shorted to ground (intermittent fault)
 
TP sensor power circuit is open between sensor and the PCM
 
TP sensor is damaged or has failed (perform a "sweep" test)
 
PCM has failed
 

Trouble Code: P2195



Fuel Trim System Lean During Power Enrichment

Possible Causes:



Air leaks after the MAF sensor, or in the EGR or PCV system
 
Base engine "mechanical" fault affecting one or more cylinders
 
Exhaust leaks before or near where the front HO2S is mounted
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
 
Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter)
 
Fuel injector (one or more) dirty or pressure regulator has failed
 
HO2S is contaminated, deteriorated or it has failed
 
Vehicle driven low on fuel or until it ran out of fuel
 

Trouble Code: P2196



Oxygen Sensor 1 (O2S1) Rich in Decel Fuel Cut-Off (DFCO)

Possible Causes:



Air leaks after the MAF sensor, or in the EGR or PCV system
 
Base engine "mechanical" fault affecting one or more cylinders
 
Exhaust leaks before or near where the front HO2S is mounted
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
 
Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter)
 
Fuel injector (one or more) dirty or pressure regulator has failed
 
HO2S is contaminated, deteriorated or it has failed
 
Vehicle driven low on fuel or until it ran out of fuel
 

Trouble Code: P2279



Intake Air System Leak

Possible Causes:



Damaged seals
 
PCM failure
 

Trouble Code: P2422



Evaporative Emission System Vent Control Malfunction

Possible Causes:



Control circuit(s) open or shorted to ground
 
Assembly is damaged or has failed
 
Exhaust connection to EGR valve is clogged or restricted
 
Catalytic converter or exhaust system is clogged or restricted
 
PCM has failed
 

 
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