Metro, Prizm 2000-2002

1.8L L4 VIN 8 Auto 1

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1.8L L4 VIN 8 Auto

Trouble Code: P0100



MAF Sensor Circuit Malfunction

Possible Causes:



MAF sensor signal circuit is open or shorted to ground
 
MAF sensor signal circuit is shorted to VREF or system power
 
MAF sensor power circuit is open (check power from MFI relay)
 
MAF sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0105



MAP Sensor Circuit Malfunction

Possible Causes:



MAP sensor signal circuit to the PCM interrupted (intermittent)
 
MAP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0106



MAP Sensor Range/Performance

Possible Causes:



MAP sensor source vacuum line is leaking or disconnected
 
MAP sensor is damaged, out-of-calibration or has failed
 
PCM has failed
 

Trouble Code: P0110



Intake Air Temperature Sensor Circuit Malfunction

Possible Causes:



IAT sensor signal circuit is open or shorted to ground
 
IAT sensor signal circuit is shorted to VREF or system power
 
IAT sensor is damaged or has failed (out of calibration)
 
PCM has failed
 

Trouble Code: P0115



Engine Coolant Temperature Sensor Circuit Malfunction

Possible Causes:



ECT sensor circuit is open, shorted to ground or to VREF
 
ECT sensor is damaged or has failed (out of calibration)
 
PCM has failed
 

Trouble Code: P0116



Engine Coolant Temperature Sensor Range/Performance

Possible Causes:



ECT sensor signal circuit is open or shorted to ground
 
ECT sensor is contaminated, out-of-calibration or has failed
 
PCM has failed
 

Trouble Code: P0120



Throttle Position Sensor Circuit Malfunction

Possible Causes:



TP sensor signal circuit open or shorted to ground
 
TP sensor ground circuit is open
 
TP sensor power circuit is open (check VREF circuit at PCM)
 
TP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0121



Throttle Position Sensor Range/Performance

Possible Causes:



MAP sensor may be out-of-calibration
 
TP sensor signal circuit is open to the PCM (intermittent fault)
 
TP sensor ground circuit is open (an intermittent fault)
 
Throttle body is damaged or throttle linkage is bent or binding
 
TP sensor is damaged or has failed
 

Trouble Code: P0125



ECT Excessive Time To Enter Closed Loop

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
ECT sensor signal circuit has high resistance
 
ECT sensor has failed
 
Inspect for low coolant level or an incorrect coolant mixture
 

Trouble Code: P0128



ECT Below Thermostat Regulating Temperature

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
ECT sensor is damaged or out-of-calibration (it is "skewed")
 
PCM has failed
 

Trouble Code: P0130



O2S-11 or HO2S-11 (Bank 1 Sensor 1) Circuit Malfunction

Possible Causes:



HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor or chassis ground
 
HO2S signal circuit is shorted to VREF or system power (B+)
 
HO2S is damaged, contaminated or it has failed
 
PCM has failed
 

Trouble Code: P0133



HO2S-11 (Bank 1 Sensor 1) Slow Response

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
HO2S element is fuel contaminated or has deteriorated
 
PCM has failed
 

Trouble Code: P0135



HO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction

Possible Causes:



HO2S heater control circuit is open or shorted to ground
 
HO2S heater control circuit is shorted to power
 
HO2S heater power circuit is open (check power from the relay)
 
HO2S heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P0136



HO2S-12 (Bank 1 Sensor 2) Circuit Malfunction

Possible Causes:



HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor or chassis ground
 
HO2S signal circuit is shorted to VREF or system power (B+)
 
HO2S is damaged, contaminated or it has failed
 
PCM has failed
 

Trouble Code: P0141



HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction

Possible Causes:



HO2S heater control circuit is open, shorted to ground or power
 
HO2S heater power circuit is open (check power from the relay)
 
HO2S heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P0171



Fuel Trim System Lean (Bank 1)

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 located in front of the HO2S location
 
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: P0172



Fuel Trim System Rich (Bank 1)

Possible Causes:



Base engine "mechanical" fault affecting one or more cylinders
 
EVAP system component has failed or canister fuel saturated
 
Exhaust leaks located in front of the HO2S location
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
 
Fuel delivery system supplying too much fuel during cruise or idle periods (e.g., faulty fuel pump, or faulty pressure regulator)
 
Fuel injector(s) is leaking or stuck partially open (one or more)
 
HO2S is contaminated, deteriorated or it has failed
 

Trouble Code: P0300



Multiple Cylinder Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine mechanical fault that affects only one cylinder
 
Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil or plug) that affects one cylinder
 

Trouble Code: P0301



Cylinder 1 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine mechanical fault that affects only Cylinder 1
 
Fuel delivery component fault that affects only Cylinder 1 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (coil or plug) that affects only Cylinder 1
 

Trouble Code: P0302



Cylinder 2 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine mechanical fault that affects only Cylinder 2
 
Fuel delivery component fault that affects only Cylinder 2 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (coil or plug) that affects only Cylinder 2
 

Trouble Code: P0303



Cylinder 3 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine mechanical fault that affects only Cylinder 3
 
Fuel delivery component fault that affects only Cylinder 3 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (coil or plug) that affects only Cylinder 3
 

Trouble Code: P0304



Cylinder 4 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine mechanical fault that affects only Cylinder 4
 
Fuel delivery component fault that affects only Cylinder 4 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (coil or plug) that affects only Cylinder 4
 

Trouble Code: P0325



Knock Sensor 1 Circuit Malfunction

Possible Causes:



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

Trouble Code: P0335



Crankshaft Position Sensor Circuit Malfunction

Possible Causes:



CKP sensor connector is damaged, open or shorted
 
CKP (Magnetic) sensor signal (+) or (-) circuit is open, shorted to ground or to power
 
CKP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0340



Camshaft Position Sensor Circuit Malfunction

Possible Causes:



CMP sensor connector is damaged, open or shorted
 
CMP sensor signal (+) circuit is open or shorted to ground
 
CMP sensor signal (-) circuit is open or shorted to ground
 
CMP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0402



Excessive EGR Flow Detected

Possible Causes:



EGR stepper motor is binding, or stuck in open position
 
EGR stepper motor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0420



Catalyst System Low Efficiency (Bank 1)

Possible Causes:



Air leaks in the exhaust manifold or exhaust pipes
 
Catalytic converter is contaminated, damaged or has failed
 
Front HO2S is older (aged) than the rear HO2S (HO2S is lazy)
 
PCM has failed
 

Trouble Code: P0440



EVAP System Incorrect Purge Flow Detected

Possible Causes:



Charcoal canister is 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 vapor line(s) blocked, damaged or disconnected
 
Purge or Vent solenoid control circuit open or shorted to ground
 
PCM has failed
 

Trouble Code: P0441



EVAP System Performance

Possible Causes:



Charcoal canister is 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 vapor line(s) blocked, damaged or disconnected
 
Purge or Vent solenoid control circuit open or shorted to ground
 
PCM has failed
 

Trouble Code: P0442



EVAP System Small Leak (0.040") Detected

Possible Causes:



Canister Purge valve is damaged, leaking or it has failed
 
Charcoal canister is loaded with fuel or moisture
 
Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
Fuel tank is cracked (leaking), or a leak exists in the 'O' ring
 
Fuel tank pressure sensor is damaged or has failed
 
Fuel vapor line(s), fuel pipes or hoses damaged or leaking
 
PCM has failed
 

Trouble Code: P0446



EVAP System Vent System Performance

Possible Causes:



EVAP vent solenoid control circuit is open or shorted to ground
 
EVAP vent solenoid is stuck partially open
 
EVAP vent solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0450



Fuel Tank Pressure Sensor Circuit Malfunction

Possible Causes:



FTP sensor circuit is open, shorted to ground or to power
 
FTP sensor ground circuit is open
 
FTP sensor power circuit is open
 
FTP sensor is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0451



Fuel Tank Pressure Sensor Range/Performance

Possible Causes:



Fuel tank pressure sensor connector is damaged or shorted
 
Fuel tank pressure sensor vacuum hoses loose or damaged
 
Fuel tank pressure sensor is damaged or out-of-calibration
 
PCM has failed
 

Trouble Code: P0455



EVAP System Gross Leak (0.080") Detected

Possible Causes:



Canister Purge valve is damaged, leaking or it has failed
 
Charcoal canister is loaded with fuel or moisture
 
Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
Fuel tank is cracked (leaking), or a leak exists in the 'O' ring
 
Fuel tank pressure sensor is damaged or has failed
 
Fuel vapor line(s), fuel pipes or hoses damaged or leaking
 
PCM has failed
 

Trouble Code: P0500



Vehicle Speed Sensor Signal Range/Performance

Possible Causes:



VSS signal circuit is open, shorted to ground or to power
 
VSS power circuit is open (check Gauge fuse in Junction block)
 
VSS is damaged or is has failed
 
PCM has failed
 

Trouble Code: P0505



Idle Control System Performance

Possible Causes:



Throttle valve is dirty or sticking (it may need to be cleaned)
 
ISC motor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0601



Control Module ROM Malfunction

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 
TSB 67-65-23 contains a repair procedure for this code
 

Trouble Code: P0602



Control Module Not Programmed

Possible Causes:



Reprogram the PCM with the correct software and calibration. If this step does not correct the problem, the PCM must be replaced and programmed with the correct software/calibration.
 

Trouble Code: P0603



Control Module Long Term Memory Reset

Possible Causes:



An interruption to the PCM main power and/or ground circuits
 
Check the PCM power and ground circuits and make repairs as necessary. Clear the codes and recheck. If it resets, the PCM must be replaced and programmed with the correct software.
 

Trouble Code: P0604



Control Module Random Access Memory Failure

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 

 
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