Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0101 [BP, BP WITH TC] DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME DATA on repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Check for related Service Bulletins and/or online 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	VERIFY CURRENT INPUT SIGNAL STATUS IS CONCERN INTERMITTENT OR CONSTANT Connect WDS or equivalent to DLC-2. Start the engine. Access ECT, MAF, TP and RPM PIDs using the WDS or equivalent. Warm-up engine until ECT PID is above 70°C {158°F}. Idle engine for 5 s or more. CAUTION: While driving, always operate the vehicle in a safe and lawful manner. Drive the vehicle under the following conditions: TP PID: 50-87.5% RPM PID: above 1,000 rpm 4th gear (MT), D range (AT) Is same DTC present?	Yes	Go to the next step.
3		No	Intermittent concern exists. Go to INTERMITTENT CONCERNS TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING )
4	CHECK MAF SENSOR TERMINALS FOR ELECTRICAL CORROSION Turn the ignition switch off. Disconnect MAF sensor connector. Check for poor connection (damaged, pulled-out terminals, corrosion, etc.). Is any problem corrosion found?	Yes	Repair or replace suspected terminal or MAF sensor, then go to Step 6.
4		No	Go to the next step.
5	INSPECT PCM CONNECTOR FOR POOR CONNECTION Disconnect PCM connector. Check for poor connection (damaged, pulled-out pins, corrosion, etc.). Is there any malfunction?	Yes	Repair terminal, then go to the next step.
5		No	Go to the next step.
6	VERIFY TROUBLESHOOTING OF DTC P0101 COMPLETED Make sure to connect all disconnected connectors. Turn ignition key to ON (Engine off). Clear the DTC from the PCM memory using the WDS or equivalent. Start the engine. Warm-up engine until ECT PID is above 70°C {158°F}. Idle engine for 5 s or more. CAUTION: While performing the Drive Mode, always operate the vehicle in a safe and lawful manner. Drive the vehicle under the following conditions: TP PID: 50-87.5% RPM PID: above 1,000 rpm 4th gear (MT), D range (AT) Is same DTC present?	Yes	Replace PCM, then go to the next step.
6		No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE ". (See AFTER REPAIR PROCEDURE ) Is any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE )
7		No	Troubleshooting completed.