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Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Saab
Satisfied Customers: 3425
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles
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How are you this day i have a issue with my 2003 saab 9.5

Customer Question

Hello how are you this day i have a issue with my 2003 saab 9.5 have a code of p1312 and pcm
JA: Have you scanned the code? Have you tried to reset it? What is the model of your '03 Saab?
Customer: aero is it p1312 with a pcm
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yes i am hopefully i can do to cash flow
JA: Anything else you think the mechanic should know?
Customer: i replace the plug with recommend plug
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Saab Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Saab
Expert:  Chad Farhat replied 1 year ago.

Hi, I' m Chad. Welcome to JustAnswer. I' m reviewing your question now, and I will be post back with your reply ASAP

Expert:  Chad Farhat replied 1 year ago.

2003 Saab 9-5 (9600) L4-2.3L Turbo (B235)

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P1312 Combustion Detection Cyl. 1+2. Open Circuit/Short To B+.

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Fault symptoms

On-Board Diagnostics

Type of diagnosis:
- Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria:
- General conditions for this trouble code: Atmospheric pressure must exceed 72 kPa and the engine coolant and intake air temperatures must exceed -7 degree C.
- Engine running. Main relay voltage exceeding 10 V. Ignition synchronized.

Fault criteria:
- Voltage exceeding 5 V continuously during 200 combustions.

- None.

System reaction to a fault:
- None.

OK report:
- Enable criteria fulfilled. Fault criteria for P1312 or P1334 not fulfilled within 300 combustions.

Fault handling: (For more information, See: Computers and Control Systems > Initial Inspection and Diagnostic Overview > Fault Handling III, Other Emission-Related Components and Function)

- Type III.

Diagnostic help
Fault diagnosis concerns an electrical fault in the connecting leads.
- Combustion Detection Cyl 1+2/Bank1, unit %

Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.

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Expert:  Chad Farhat replied 1 year ago.

what is the mileage on the car ?

Please let me know

Thank You
Chad Farhat
ASE Certified Technician

Expert:  Chad Farhat replied 1 year ago.

Hey how are you

Did you get fixed or if you need more help , please just let me know ?

Hope I was helpful to you

A Positive Rating is Much Appreciated

This Post Will Stay Open For You to Come Back and ask me any Follow up Questions you may have on this issue Even after you Rate Me.

Thank You
Chad Farhat ( aka -Customer)
ASE Certified Technician