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1997 Sunfire 2.4L - Troubleshooting P1133, P0335, and P0342 OBD2 Fault Codes

Model: 97 2.4 Fault Code: P0335 Posted: 2014-05-26 11:23

Hi everyone, I'm looking for guidance on how to troubleshoot the following OBD2 fault codes on my 1997 Sunfire 2.4L: P1133 (Coolant Temperature Sensor Circuit Range/Performance), P0335 (Crankshaft Position Sensor A Circuit Malfunction), and P0342 (Camshaft Position Sensor B Circuit Malfunction). The Check Engine Light is currently off, but these codes are stored in the PCM. I'm not sure where to begin with diagnostics—any advice on which sensor or system to prioritize? Also, has anyone experienced similar issues after recent repairs like a head gasket replacement?

Related fault codes
P0335P0342P1133
Comments (5)
Anonymous 2014-05-26 11:45

Start by checking the Crankshaft Position (CKP) sensor. Using an OBD2 scanner, monitor the CKP signal voltage and engine RPM. Also review the freeze frame data for key operating conditions. Any recent repairs or maintenance work performed recently? This could be a contributing factor.

Anonymous 2014-05-26 12:20

We recently had a head gasket replaced, and shortly after that, our vehicle failed an emissions test with these three codes appearing—despite the Check Engine Light not being on. Could this repair have triggered a sensor or system issue?

Anonymous 2014-05-26 13:10

It's recommended to clear the stored fault codes from the PCM and complete a drive cycle to reset the OBD2 monitors. Afterward, observe whether the Check Engine Light activates during normal driving conditions. This helps determine if the codes are active or just stored.

Anonymous 2014-05-26 13:42

I'm having trouble finding information about the camshaft position sensor on a 1997 Sunfire 2.4L—where is it located? I've searched online extensively but can't locate a clear diagram or description.

Anonymous 2014-05-26 15:12

autojoe wrote: It's recommended to clear the stored fault codes from the PCM and complete a drive cycle to reset the OBD2 monitors. Afterward, observe whether the Check Engine Light activates during normal driving conditions. This helps determine if the codes are active or just stored. Note: Disconnecting the battery will clear the codes, but using an OBD2 scanner is more reliable for accurate reading and code verification.