Diagnostic Aids

WARNING: This page is about a different car, the 2002 Isuzu Rodeo Sport and 2002 Isuzu Rodeo. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before replacing any components that scan tool suggested are faulty, check all power and ground circuits. See WIRING DIAGRAMS article.

A short to voltage in one of the sensor inputs may cause one or more of the following DTCs to be set:

P0108/P1106
P0113/P1111
P0118/P1115
P0123/P1121
P0463

If a sensor a has been determined to have been shorted to voltage, ensure that sensor is not damaged. A damaged sensor will continue to indicate a high or low voltage after the suspect circuit has been repaired. If the sensor was damaged, replace sensor and retest system.

An open in the sensor ground circuit between the PCM and the splice will cause one or more of the following DTCS to be set:

P0108/P1106
P0113/P1111
P0118/P1115
P0453/P0463

A short to ground in the 5-volt reference "A" circuit will cause one or more of the following DTCs to be set:

P0107/P1107
P0112/P1112
P0117/P1114
P0122/P1122
P0405
P0454/P0462
P0532

An intermittent problem can be caused by:

Poor connection at PCM. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals and poor terminal connection. Inspect wiring harness for damage.
Inspect wiring harness for damage, misrouted harness, rubbed-through wire insulation or broken wire inside insulation. If harness is not damaged, use scan tool to observe an affected sensor display parameter, while moving wiring harness related to following sensors:
- FVP sensor.
- ECT sensor.
- MAP sensor.
- EGR pintle position sensor.
- TP sensor.
- A/C Pressure sensor.

A change in display will indicate location of fault.