DTC P2245:00 [MZ-CD 1.6]

id0102g8900500

DTC P2245:00

A/F sensor reference voltage circuit low

DETECTION CONDITION

•  The PCM monitors the A/F sensor signal. If the voltage from A/F sensor is less than threshold, the PCM determines that the A/F sensor circuit has a malfunction.

POSSIBLE CAUSE

•  A/F sensor connector or terminal malfunction

•  Short to ground in wiring harness between A/F sensor terminal E and PCM terminal 243

•  A/F sensor malfunction

•  PCM connector or terminal malfunction

•  Open circuit in the wiring harness between A/F sensor terminal E and PCM terminal 243

•  PCM malfunction

DTC P2245:00	A/F sensor reference voltage circuit low
DETECTION CONDITION	• The PCM monitors the A/F sensor signal. If the voltage from A/F sensor is less than threshold, the PCM determines that the A/F sensor circuit has a malfunction.
POSSIBLE CAUSE	• A/F sensor connector or terminal malfunction • Short to ground in wiring harness between A/F sensor terminal E and PCM terminal 243 • A/F sensor malfunction • PCM connector or terminal malfunction • Open circuit in the wiring harness between A/F sensor terminal E and PCM terminal 243 • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT A/F SENSOR CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the A/F sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion) • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 8.
3		No	Go to the next step.
4	INSPECT A/F SENSOR CIRCUIT FOR SHORT TO GROUND • Disconnect the A/F sensor connector. • Inspect for continuity between A/F sensor terminal E (wiring harness-side) and body ground. • Is there continuity?	Yes	If the short to ground circuit could be detected: • Repair or replace the wiring harness for possible short to ground. If the short to ground circuit could not be detected: • Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].) Go to Step 8.
4		No	Go to the next step.
5	INSPECT A/F SENSOR • Inspect the A/F sensor. • Is there any malfunction?	Yes	Replace the A/F sensor, then go to Step 8.
5		No	Go to the next step.
6	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion) • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 8.
6		No	Go to the next step.
7	INSPECT A/F SENSOR CIRCUIT FOR OPEN CIRCUIT • Switch the ignition to off. • Inspect for continuity between the A/F sensor terminal E (wiring harness-side) and PCM terminal 243 (wiring harness-side) • Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
8	VERIFY THAT DTC P2245:00 TROUBLESHOOTING IS COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].) Go to the next step.
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the after repair procedure. (See AFTER REPAIR PROCEDURE [MZ-CD 1.6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6].)
9		No	DTC troubleshooting completed.