1999 SAAB 9-5 Check Engine Light - OBII Codes

GINAGIRL72

MEMBER
1999 SAAB 9-5
4 CYL
2WD
AUTOMATIC
137,000 MILES

Hello,
Had a coolant hose explode the other day. Fixed it but my mechanic was a little rough with wiring trying to get in there. I am hoping this is the case or I have a bad lifter and my engine is shot

I am running on 3 cylinders now and when it goes above 2000 RPM it shakes badly.

Here are the codes from the reader I got right now.
P0303 - Cylinder 3 Misfire
P1303 - Ignition System / Misfire
P1110 - Fuel/Air Metering

Please if someone can help. Was about to sell car AS IS but had a bad feeling it may be a mistake. I only bought this in May. This is my second overheating issue because of a hose, just FYI.

Thank you kindly in advance,
Gina

4 Replies

DAVE H

MECHANIC
13,383 POSTS

Hello .. thanks for the donation

Check the wiring is good at cylinder 3 both codes are for cylinder 3 misfire .. check wires to plug and injector also check the plug condition !!

also do the first step in these test's

DTC P1110: CHARGE AIR BYPASS (CAB) VALVE PERFORMANCE MALFUNCTION (4-CYLINDER)
Disconnect vacuum hose from CAB valve and connect pressure/vacuum pump to disconnected hose. See Fig. 20. Disconnect vacuum hose from periscope-shaped vacuum port by throttle body. Apply pressure with pump to ensure that air blows out of disconnected hose. Plug end of hose and test again to check for pressure leaks. Repair any leaks found in vacuum hoses. If a leak is present, but vacuum hoses are okay, replace CAB solenoid. See CHARGE AIR BYPASS (CAB) VALVE (4-CYLINDER) under ENGINE SENSORS & SWITCHES in REMOVAL, OVERHAUL & INSTALLATION article. Go to step 3. If no leaks are present, go to next step.
Connect TECH 2 scan tool to Data Link Connector (DLC). Use scan tool to activate CHARGE AIR BYPASS SOLENOID. Disconnect CAB solenoid vacuum hose at throttle body. Apply pressure with pressure/vacuum pump to ensure that air blows out of disconnected hose. Plug end of hose and test again to check for pressure leaks. Repair any leaks found in vacuum hose. If a leak is present, but vacuum hose is okay, or if air does not blow out of disconnected vacuum hose, replace CAB solenoid. Go to step 3. If no problems were found, replace CAB valve. Go to next step.
Connect TECH 2 scan tool to Data Link Connector (DLC). Turn ignition on and check status of DTC P1110. Test drive vehicle and accelerate with gas pedal completely depressed. Release gas pedal rapidly before engine speed reaches 3500 RPM. Repeat 2 more times. Check scan tool reading. If OK is displayed, use scan tool to clear DTCs from all systems. If NOT READY is displayed, back up to INITIATING DIAGNOSTICS and retest. If DTC P1110 is displayed, substitute known good ECM and retest system. See ENGINE CONTROL MODULE (ECM) under COMPUTERIZED ENGINE CONTROLS in REMOVAL, OVERHAUL & INSTALLATION article.
Fig. 20: Identifying Charge Air Bypass Valve Components (4-Cylinder)
Courtesy of SAAB-SCANIA OF AMERICA, INC.