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Trouble Code Identification

TROUBLE CODE IDENTIFICATION

Code No. Circuit Affected
No Code System Normal
11 ECU (B+)
12 & 13 RPM Signal
14 Ignition Signal
21 Oxygen Sensor Signal
22 Coolant Temperature Sensor Signal
24 Intake Air Temperature Sensor Signal
25 (1) Lean Air/Fuel Mixture
26 (1) Rich Air/Fuel Mixture
27 (1) Sub-Oxygen Sensor Signal
31 Air Flow Meter Signal
32 Air Flow Meter Signal (7M-GE) HAC Sensor Signal (7M-GTE)
34 (2) (3) Turbocharger Pressure
41 Throttle Position Sensor Signal
42 Vehicle Speed Sensor Signal
43 Starter Signal
51 Switch Signal
71 (1) EGR System Malfunction
(1) Only applicable to 7M-GE California models.
(2) Only applicable to 7M-GTE models.
(3) Abnormalities in air flow meter may also be detected.
TROUBLE CODES & PROBABLE CAUSE

Code No. Probable Cause
11 Main Relay And/Or Circuit, Ignition Switch And/Or Circuit, ECU
12 Distributor And/Or Circuit, Starter Signal, ECU
13 Distributor And/Or Circuit, ECU
14 Ignition Coil, Ignitor And/Or Circuit, ECU
21 O2 Sensor And/Or O2 Heater Signal And/Or Circuit, ECU
22 Coolant Temperature Sensor And/Or Circuit, ECU
24 Intake Air Temperature Sensor Or Circuit, ECU
25 (1) Injector And/Or Circuit, O2 Sensor And/Or, Circuit, Fuel Line Pressure, Airflow Meter, Coolant Temperature Sensor, Ignition System, ECU
26 (1) Injector And/Or Circuit, Fuel Line Pressure, Cold Start Injector, Airflow Meter, Coolant Temperature Sensor, ECU
27 (1) Sub-O2 Sensor/Heater And/Or Circuit, ECU
31 Airflow Meter And/Or Circuit, ECU
32 (2) Airflow Meter or Circuit, ECU
34 (3) Turbocharger, Airflow Meter, ECU Or Intercooler System
41 Throttle Position Sensor And/Or Circuit, ECU
42 Speed Sensor And/Or Circuit, ECU
43 Ignition Switch And/Or Circuit, ECU
51 Throttle Position Sensor And/Or Circuit, A/C Switch And/Or Circuit, A/C Amplifier, ECU
71 (1) EGR System, EGR Gas Temperature Sensor And/Or Circuit, BVSV For EGR And/Or Circuit, ECU
(1) 7M-GE California models only.
(2) On 7M-GTE models, probable cause is HAC Sensor and/or circuit, or ECU.
(3) Only applicable to 7M-GTE models.
(4) Abnormalities in airflow meter may also be detected.
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