Mechanics

HAVING PROBLEM WITH ENHABCED TRACTION SYSTEM ON MY 98 CHEVY 2.4

1998 Chevrolet Cavalier • 170,000 miles

Car would occasionally start to***** while driving. The car was in drive, the check engine light would come on and also the enhanced traction system off symbol would come on.
Avatar
Fkfred
October 30, 2011.




Whats the bleeped word? Space your letters to bypass censor.

Tiny
Fixitmr
Oct 30, 2011.
Did you get codes read yet? Then post back.

Tiny
Fixitmr
Oct 30, 2011.
J e r k e d

Tiny
Fkfred
Oct 30, 2011.
J e r k
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Tiny
Fkfred
Oct 30, 2011.
Have you had the computer scanned for codes yet fkfred?

Rivermikerat
Dec 2, 2011.
Yes, I got the codes, they are as followed P0341 and P0335

Tiny
Fkfred
Dec 3, 2011.
The traction control system OFF message is because of the fault codes.
P0335=Crank position Sensor fault.
P0341=Cam Position Sensor.

Either these sensors have gone bad, or their airgaps are wrong.

DTC P0335 - CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT
NOTE: For circuit reference, see WIRING DIAGRAMS - 2.4L article.
Circuit Description
Powertrain Control Module (PCM) supplies battery power and ground to CKP sensor. CKP sensor
sends a reference signal to PCM 7 times per revolution to indicate crankshaft position and engine
speed. The seventh pulse is the sync pulse and is used for crankshaft position reference. PCM
calculates when to pulse ignition coils based on these signals.
Condition for setting this DTC is as follows: 7X resync counter is greater than 15 counts within 4 minutes and 15 seconds.
DTC P0341 not set.
Diagnostic Procedures
Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK, then go
to next step.
1.
If engine will not start, go to NO START DIAGNOSIS in BASIC TESTING - 2.4L article. If
engine will start, go to next step.
2.
Using scan tool, select CLEAR INFO or CLEAR DTCS function to clear DTCs. Start engine
and allow it to idle for 5 minutes or until Malfunction Indicator Light (MIL) turns on. If MIL is
on, go to next step. If MIL is off, go to step 5).
3.
With engine running, wiggle PCM connectors, CKP sensor connector and related wiring. If
engine stumbles, go to step 6). If engine does not stumble, go to step 7).
4.
Operate any non-engine related accessories on vehicle. If MED. RESOLUTION RESYNC
CNTR on scan tool resyncs while operating accessories, go to step 9). If MED. RESOLUTION
RESYNC CNTR on scan tool does not resync while operating accessories, go to step 4).
5.
Repair poor connector connection, wiring or connector that caused engine to stumble. After
repairs, go to step 13).
6.
7. If MIL turned on in step 3), go to next step. If MIL did not turn on, go to step 13).
Check wiring to PCM, ICM and CKP sensor for pinched or worn through wire insulation.
Repair as necessary. After repairs, go to step 13). If wiring is okay, go to step 10).
8.
Repair faulty circuit or accessory component that caused MED. RESOLUTION RESYNC
CNTR on scan tool to resync. After repairs, go to step 13).
9.
Replace CKP sensor. Start engine and allow engine to idle for 5 minutes or until MIL turns on.
If MIL turns on, go to next step. If MIL does not turn on, go to step 13).
10.
Replace PCM. Program replacement PCM using required equipment. Start engine and allow it
to idle for 5 minutes or until MIL turns on. If MIL is on, go to next step. If MIL is off, go to
step 13).
11.
Replace ICM. Start engine and allow it to idle for 5 minutes or until MIL turns on. If MIL is on,
see DIAGNOSTIC AIDS. If MIL is off, go to next step.
12.
ENGINE CONTROLS - TESTS W/CODES - 2.4L -1998 Chevrolet Cavalier Page 1 of 2
12/3/2011
Using scan tool, select CLEAR INFO or CLEAR DTCS function to clear DTCs. Start engine
and allow it to idle. Ensure engine is at normal operating temperature. Operate vehicle within
conditions required for setting this DTC. Select SPECIFIC DTC function then enter DTC
P0335. If scan tool indicates TEST RAN AND PASSED, go to next step. If scan tool does not
indicate TEST RAN AND PASSED, repeat step 3).
13.
If any other DTCs are set, diagnose DTCs as necessary. If no other DTCs are set, no problem is
indicated at this time.
14.
Diagnostic Aids
If complaint is engine cranks but will not run, DTC P0335 may be set if engine is cranked more than
15 times without turning ignition off between starting attempts.
An intermittent can be caused by a defective CKP sensor reluctor wheel. Remove CKP sensor.
Inspect reluctor wheel through CKP sensor mounting hole. Check porosity and condition of reluctor
wheel. Intermittent can also be caused by a rubbed-through wire insulation or a poor connection.

ENGINE CONTROLS - TESTS W/CODES - 2.4L -1998 Chevrolet Cavalier Page 2 of 2

DTC P0341 - CAMSHAFT POSITION (CMP) SENSOR CIRCUIT
NOTE: For circuit reference, see WIRING DIAGRAMS - 2.4L article.
Circuit Description
Powertrain Control Module (PCM) uses CMP sensor signal to determine which cylinder is misfiring
when a misfire is present. When PCM receives an intermittent signal from CMP sensor, the CMP
RESYNC counter will increment.
Conditions for setting this DTC are as follows: Engine is running.
CMP RESYNC counter is greater than 15 counts in less than 256 seconds.
Diagnostic Procedures
Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK, then go
to next step.
1.
Start and allow engine to idle. Install scan tool. If CMP RESYNC counter is incrementing, go
to next step. If CMP RESYNC counter is not incrementing, go to step 4).
2.
Turn ignition off. Disconnect CMP sensor connector. Turn ignition on. If CMP RESYNC
counter is incrementing, go to step 5). If CMP RESYNC counter is not incrementing, go to step
6).
3.
With engine running, carefully wiggle CMP sensor connector. If CMP RESYNC counter is
incrementing, go to next step. If CMP RESYNC counter is not incrementing, go to step 9).
4.
Check for poor connection at CMP sensor connector. Repair as necessary. After repairs, go to
step 10). If connector is okay, go to step 7).
5.
Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go
to step 10).
6.
Turn ignition off. Disconnect PCM harness connector. Check CMP terminal at PCM harness
connector for poor connection. Repair as necessary. After repairs, go to step 10). If connections
are okay, go to next step.
7.
8. Replace CMP sensor. After replacing sensor, go to step 10).
Turn ignition on, with engine off. Using scan tool, review FREEZE FRAME data and note
parameters. Start engine and operate vehicle within conditions required for setting this DTC,
and as close to conditions recorded in FREEZE FRAME as possible. If CMP RESYNC counter
is incrementing, go to step 3). If CMP RESYNC counter is not incrementing, go to next step.
9.
Using scan tool, select CLEAR INFO or CLEAR DTCS function to clear DTCs. Start engine
and allow it to idle. Ensure engine is at normal operating temperature. Operate vehicle within
conditions required for setting this DTC. Select SPECIFIC DTC function then enter DTC
P0341. If scan tool indicates TEST RAN AND PASSED, go to next step. If scan tool does not
indicate TEST RAN AND PASSED, repeat step 2).
10.
If any other DTCs are set, diagnose DTCs as necessary. If no other DTCs are set, no problem is
indicated at this time.
11.
ENGINE CONTROLS - TESTS W/CODES - 2.4L -1998 Chevrolet Cavalier Page 1 of 2
12/3/2011
Diagnostic Aids
An intermittent problem can be caused by a poor connection, rubbed-through wire insulation or
broken wire inside insulation. Whenever PCM sees less than 15 resyncs in 256 seconds, counter is
reset to zero. If a poor CMP sensor connection is present, CAM SENSOR REFERENCE ACTIVITY
counter will stop incrementing and CAM SENSOR RESYNC counter will start incrementing.

ENGINE CONTROLS - TESTS W/CODES - 2.4L -1998 Chevrolet Cavalier Page 2 of 2

Rivermikerat
Dec 4, 2011.

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