12
25
31
34
should be fun checking these out in the morning, seems the afm needs to be checked as well as the cps plugs
25
31
34
should be fun checking these out in the morning, seems the afm needs to be checked as well as the cps plugs
4 codes at once
- Thread starter noah89t
- Start date
Code Error
11 ECU(+B)
Diagnosis
* Momentary interruption in power supply to ECU.
Trouble Area
* Ignition switch circuit
* Ignition switch
* Main relay circuit
* Main relay
* ECU
12 RPM Signal
Diagnosis
* No "NE" or "G" signal to ECU within 2 seconds after engine has been cranked.
Trouble Area
* Distributor, or CPS, circuit
* Distributor or CPS
* Starter signal circuit
* ECU
13 RPM Signal
Diagnosis
* No "NE" signal to ECU when engine speed is about 1,000 RPM.
Trouble Area
* Distributor, or CPS, circuit
* Distributor or CPS
* ECU
14 Ignition Signal
Diagnosis
* No "IGF" signal to ECU "A" times in succession.
A = 6-8 (7M-GE)
A= 3 (7M-GTE)
Trouble Area
* Igniter and ignition coil circuit
* Igniter and ignition coil
* ECU
21 Oxygen Sensor Signal
Diagnosis
* Detection of oxygen sensor deterioration.
Trouble Area
* Oxygen sensor circuit
* Oxygen sensor
* ECU
22 Water Temp Sensor Signal
Diagnosis
* Open or short circuit in water temp sensor signal (THW).
Trouble Area
* Water temp sensor circuit
* Water temp sensor
* ECU
24 Intake air Temp Sensor Signal
Diagnosis
* Open or short circuit in intake air temp sensor signal (THA).
Trouble Area
* Intake air temp sensor circuit
* Intake air temp sensor
* ECU
25 Air-Fuel Ratio Lean Malfunction
Diagnosis
* When air-fuel ratio feedback compensation value or adaptive control value continues at the upper(lean) or lower(rich) limit renewed for a certain period of time.
* When air-fuel ration feedback compensation value or adaptive control value feedback frequency is abnormally high during feedback condition.
* When marked variation is detected in engine revolutions for each cylinder during idle switch on and feedback condition.
Trouble Area
* Injector circuit
* Injector
* Fuel line pressure
* Air flow meter
* Air intake system
* Oxygen sensor circuit
* Oxygen sensor
* Ignition system
* Water temp sensor
* ECU
26 Air-Fuel Ratio Rich Malfunction
Diagnosis
* When air-fuel ratio feedback compensation value or adaptive control value continues at the upper(lean) or lower(rich) limit renewed for a certain period of time.
* When air-fuel ration feedback compensation value or adaptive control value feedback frequency is abnormally high during feedback condition.
* When marked variation is detected in engine revolutions for each cylinder during idle switch on and feedback condition.
Trouble Area
* Injector circuit
* Injector
* Fuel line pressure
* Air flow meter
* Cold start injector
* Oxygen sensor circuit
* Oxygen sensor
* Water temp sensor
* ECU
27 Sub-Oxygen Sensor Signal or Sensor Heater
Diagnosis(Sub-Oxygen Sensor Signal)
* Open or short circuit in sub-oxygen sensor signal (OX2).
Trouble Area
* Sub-oxygen sensor circuit
* Sub-oxygen sensor
* ECU
Diagnosis(Sub-Oxygen Sensor Heater)
* Open or short circuit in sub-oxygen sensor heater (HT).
Trouble Area
* Sub-oxygen sensor heater circuit
* Sub-oxygen sensor heater
* ECU
31 Air Flow Meter Signal
Diagnosis
* (7M-GE) Open circuit in VC signal or short circuit between VS and E2 when idle contacts are closed.
* (7M-GTE) Open or short circuit in air flow meter signal.
Trouble Area
* Air flow meter circuit
* Air flow meter
* ECU
32
Air Flow Meter Signal(7M-GE)
HAC Sensor Signal(7M-GTE)
Diagnosis(Air Flow Meter Signal(7M-GE))
* Open circuit in E2 or short circuit between VC and VS.
Trouble Area
* Air flow meter circuit
* Air flow meter
* ECU
Diagnosis(HAC Sensor Signal(7M-GTE))
* Open circuit or short circuit in HAC sensor signal.
Trouble Area
* ECU
34 Turbocharger Pressure
Diagnosis
* The turbocharger pressure is abnormal.
Trouble Area
* Turbocharger
* Air flow meter
* ECU
* Intercooler system
41 Throttle Position Sensor Signal
Diagnosis
* Open or short circuit in throttle position sensor signal.
Trouble Area
* Throttle position sensor circuit
* Throttle position sensor
* ECU
42 Vehicle Speed Sensor Signal
Diagnosis
* No "SPD" signal to ECU for 8 seconds when engine speed is between 2,500RPM and 4,500RPM (7M-GE) or 4,000RPM (7M-GTE) and coolant temp is below 80°C(176°F) and neutral start switch is off.
Trouble Area
* Vehicle speed sensor circuit
* Vehicle speed sensor
* ECU
43 Starter Signal
Diagnosis
* No "STA" signal to ECU until engine speed reaches 800RPM with vehicle not moving.
Trouble Area
* Ignition switch circuit.
* Ignition switch
* ECU
51 Switch Signal
Diagnosis
* No "IDL" signal, "NSW" signal or "A/C" signal to ECU, during diagnosis check.
Trouble Area
* A/C switch circuit
* A/C switch
* A/C amplifier
* Throttle position sensor circuit
* Throttle position sensor
* ECU
52 Knock Sensor Signal
Diagnosis
* Open or short circuit in knock sensor signal.
Trouble Area
* Knock sensor circuit
* Knock sensor
* ECU
53 Knock Control Signal in ECU
Diagnosis
* Knock control program faulty.
Trouble Area
* ECU
71 EGR System Malfunction
Diagnosis
* EGR gas temp below predetermined level during EGR operation.
* Open circuit in EGR gas temp sensor signal (THG).
Trouble Area
* EGR system (EGR valve, EGR hose etc.)
* EGR gas temp sensor circuit
* EGR gas temp sensor
* VSV for EGR circuit
* VSV for EGR
* ECU
11 ECU(+B)
Diagnosis
* Momentary interruption in power supply to ECU.
Trouble Area
* Ignition switch circuit
* Ignition switch
* Main relay circuit
* Main relay
* ECU
12 RPM Signal
Diagnosis
* No "NE" or "G" signal to ECU within 2 seconds after engine has been cranked.
Trouble Area
* Distributor, or CPS, circuit
* Distributor or CPS
* Starter signal circuit
* ECU
13 RPM Signal
Diagnosis
* No "NE" signal to ECU when engine speed is about 1,000 RPM.
Trouble Area
* Distributor, or CPS, circuit
* Distributor or CPS
* ECU
14 Ignition Signal
Diagnosis
* No "IGF" signal to ECU "A" times in succession.
A = 6-8 (7M-GE)
A= 3 (7M-GTE)
Trouble Area
* Igniter and ignition coil circuit
* Igniter and ignition coil
* ECU
21 Oxygen Sensor Signal
Diagnosis
* Detection of oxygen sensor deterioration.
Trouble Area
* Oxygen sensor circuit
* Oxygen sensor
* ECU
22 Water Temp Sensor Signal
Diagnosis
* Open or short circuit in water temp sensor signal (THW).
Trouble Area
* Water temp sensor circuit
* Water temp sensor
* ECU
24 Intake air Temp Sensor Signal
Diagnosis
* Open or short circuit in intake air temp sensor signal (THA).
Trouble Area
* Intake air temp sensor circuit
* Intake air temp sensor
* ECU
25 Air-Fuel Ratio Lean Malfunction
Diagnosis
* When air-fuel ratio feedback compensation value or adaptive control value continues at the upper(lean) or lower(rich) limit renewed for a certain period of time.
* When air-fuel ration feedback compensation value or adaptive control value feedback frequency is abnormally high during feedback condition.
* When marked variation is detected in engine revolutions for each cylinder during idle switch on and feedback condition.
Trouble Area
* Injector circuit
* Injector
* Fuel line pressure
* Air flow meter
* Air intake system
* Oxygen sensor circuit
* Oxygen sensor
* Ignition system
* Water temp sensor
* ECU
26 Air-Fuel Ratio Rich Malfunction
Diagnosis
* When air-fuel ratio feedback compensation value or adaptive control value continues at the upper(lean) or lower(rich) limit renewed for a certain period of time.
* When air-fuel ration feedback compensation value or adaptive control value feedback frequency is abnormally high during feedback condition.
* When marked variation is detected in engine revolutions for each cylinder during idle switch on and feedback condition.
Trouble Area
* Injector circuit
* Injector
* Fuel line pressure
* Air flow meter
* Cold start injector
* Oxygen sensor circuit
* Oxygen sensor
* Water temp sensor
* ECU
27 Sub-Oxygen Sensor Signal or Sensor Heater
Diagnosis(Sub-Oxygen Sensor Signal)
* Open or short circuit in sub-oxygen sensor signal (OX2).
Trouble Area
* Sub-oxygen sensor circuit
* Sub-oxygen sensor
* ECU
Diagnosis(Sub-Oxygen Sensor Heater)
* Open or short circuit in sub-oxygen sensor heater (HT).
Trouble Area
* Sub-oxygen sensor heater circuit
* Sub-oxygen sensor heater
* ECU
31 Air Flow Meter Signal
Diagnosis
* (7M-GE) Open circuit in VC signal or short circuit between VS and E2 when idle contacts are closed.
* (7M-GTE) Open or short circuit in air flow meter signal.
Trouble Area
* Air flow meter circuit
* Air flow meter
* ECU
32
Air Flow Meter Signal(7M-GE)
HAC Sensor Signal(7M-GTE)
Diagnosis(Air Flow Meter Signal(7M-GE))
* Open circuit in E2 or short circuit between VC and VS.
Trouble Area
* Air flow meter circuit
* Air flow meter
* ECU
Diagnosis(HAC Sensor Signal(7M-GTE))
* Open circuit or short circuit in HAC sensor signal.
Trouble Area
* ECU
34 Turbocharger Pressure
Diagnosis
* The turbocharger pressure is abnormal.
Trouble Area
* Turbocharger
* Air flow meter
* ECU
* Intercooler system
41 Throttle Position Sensor Signal
Diagnosis
* Open or short circuit in throttle position sensor signal.
Trouble Area
* Throttle position sensor circuit
* Throttle position sensor
* ECU
42 Vehicle Speed Sensor Signal
Diagnosis
* No "SPD" signal to ECU for 8 seconds when engine speed is between 2,500RPM and 4,500RPM (7M-GE) or 4,000RPM (7M-GTE) and coolant temp is below 80°C(176°F) and neutral start switch is off.
Trouble Area
* Vehicle speed sensor circuit
* Vehicle speed sensor
* ECU
43 Starter Signal
Diagnosis
* No "STA" signal to ECU until engine speed reaches 800RPM with vehicle not moving.
Trouble Area
* Ignition switch circuit.
* Ignition switch
* ECU
51 Switch Signal
Diagnosis
* No "IDL" signal, "NSW" signal or "A/C" signal to ECU, during diagnosis check.
Trouble Area
* A/C switch circuit
* A/C switch
* A/C amplifier
* Throttle position sensor circuit
* Throttle position sensor
* ECU
52 Knock Sensor Signal
Diagnosis
* Open or short circuit in knock sensor signal.
Trouble Area
* Knock sensor circuit
* Knock sensor
* ECU
53 Knock Control Signal in ECU
Diagnosis
* Knock control program faulty.
Trouble Area
* ECU
71 EGR System Malfunction
Diagnosis
* EGR gas temp below predetermined level during EGR operation.
* Open circuit in EGR gas temp sensor signal (THG).
Trouble Area
* EGR system (EGR valve, EGR hose etc.)
* EGR gas temp sensor circuit
* EGR gas temp sensor
* VSV for EGR circuit
* VSV for EGR
* ECU
12= The signal from the CPS is incorrect. Does your tach bounce when you crank the engine? A common issue with these cars and their age seems to be the connector comming off it. Especially ones where somebody has been playing with it before you.
25, 31, and 34 could be related. Are you running higher than stock boost levels, with out any tuning or enrichment device? 34 means the airflow meter is sending a stronger signal that it should. 31 means the signal is wrong.
25 means the ECU is in rich command.
And these could also be not related at all.
Is your wastegate shimmed? You could even have a restricted fuel filter. Or maybe need an injection service. But these won't set the 31 and 34. Just the air flow meter will.
25, 31, and 34 could be related. Are you running higher than stock boost levels, with out any tuning or enrichment device? 34 means the airflow meter is sending a stronger signal that it should. 31 means the signal is wrong.
25 means the ECU is in rich command.
And these could also be not related at all.
Is your wastegate shimmed? You could even have a restricted fuel filter. Or maybe need an injection service. But these won't set the 31 and 34. Just the air flow meter will.
Last edited:
i run 21 pounds of boost on a 57 trim and a shimmed wastegate, fpr, lexus/550's walbro, spearco ic, etc... all my bolt ons are below basically
Clear your codes, and see what comes back. You had tuning done on a dyno with these mods? You could also just have fuel pressure that is low, giving you your 25. 34 is overboost, measured by the airflow meter.
You could have an intake leak. That will take time to go over all the intercooler piping and manifold.
You could have an intake leak. That will take time to go over all the intercooler piping and manifold.