Need Advice w/ Error Codes on 99 SE
01-24-2004, 01:07 PM
#1
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Join Date: Aug 2002
Posts: 30
Need Advice w/ Error Codes on 99 SE
My max has a hard time cold starting and idles at 1,000 rpm even when warmed up. I read the following two error codes:
1. 0802 (P0335): POS Crankshaft Position Sensor or Curcuit fault
2. 0510 (P0138): Downstream O2 sensor maximum voltage monitor fault
What do these mean? Should I just install a new O2 sensor and hope it goes away? I don't want to pay a mechanic for hours of trouble shooting if I can do some of it myself.
Thanks for your suggestions!
Speedyvonquick
1. 0802 (P0335): POS Crankshaft Position Sensor or Curcuit fault
2. 0510 (P0138): Downstream O2 sensor maximum voltage monitor fault
What do these mean? Should I just install a new O2 sensor and hope it goes away? I don't want to pay a mechanic for hours of trouble shooting if I can do some of it myself.
Thanks for your suggestions!
Speedyvonquick
01-24-2004, 06:26 PM
#3
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Join Date: Sep 2003
Posts: 288
Originally Posted by Speedyvonquick
My max has a hard time cold starting and idles at 1,000 rpm even when warmed up. I read the following two error codes:
1. 0802 (P0335): POS Crankshaft Position Sensor or Curcuit fault
2. 0510 (P0138): Downstream O2 sensor maximum voltage monitor fault
What do these mean? Should I just install a new O2 sensor and hope it goes away? I don't want to pay a mechanic for hours of trouble shooting if I can do some of it myself.
Thanks for your suggestions!
Speedyvonquick
1. 0802 (P0335): POS Crankshaft Position Sensor or Curcuit fault
2. 0510 (P0138): Downstream O2 sensor maximum voltage monitor fault
What do these mean? Should I just install a new O2 sensor and hope it goes away? I don't want to pay a mechanic for hours of trouble shooting if I can do some of it myself.
Thanks for your suggestions!
Speedyvonquick
There are two crankshaft postion sensors; one is just below the crankshaft pulley and the other is at the rear of the engine near the transaxle housing. The POS sensor is the one near rear of the engine. Check to make sure the electrical connectors are plugged in (you might want to unplug it and then plug it back in). If the sensor has gone bad, you can purchase a new one for about $100 and replace it yourself (just a single bolt). That's most likely what's causing your drivability issues.
The downstream O2 sensor really doesn't affect anything drivability-wise. You can replace that whenever you get around to it. All it does is help the ECU monitor the efficiency of the catalyst system. Upstream sensors are what the ECU uses to help maintain the air/fuel mixture and they're the ones that will cause observable problems when they fail.
01-25-2004, 05:05 PM
#4
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Join Date: Aug 2002
Posts: 30
Originally Posted by njmaxseltd
Reset your ECu and see if both come back. If so replace both sensors.
Thank you.
01-25-2004, 05:14 PM
#5
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Posts: 30
Originally Posted by DanL
There are two crankshaft postion sensors; one is just below the crankshaft pulley and the other is at the rear of the engine near the transaxle housing. The POS sensor is the one near rear of the engine. Check to make sure the electrical connectors are plugged in (you might want to unplug it and then plug it back in). If the sensor has gone bad, you can purchase a new one for about $100 and replace it yourself (just a single bolt). That's most likely what's causing your drivability issues.
The downstream O2 sensor really doesn't affect anything drivability-wise. You can replace that whenever you get around to it. All it does is help the ECU monitor the efficiency of the catalyst system. Upstream sensors are what the ECU uses to help maintain the air/fuel mixture and they're the ones that will cause observable problems when they fail.
The downstream O2 sensor really doesn't affect anything drivability-wise. You can replace that whenever you get around to it. All it does is help the ECU monitor the efficiency of the catalyst system. Upstream sensors are what the ECU uses to help maintain the air/fuel mixture and they're the ones that will cause observable problems when they fail.
01-27-2004, 03:59 PM
#6
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Posts: 30
I unplugged the POS crankshaft sensor and blew out some road grit. When I plugged it back in and checked the codes, I got two completely different codes.
1008 (P0443)--EVAP Canister purge control valve circuit fault
0205 (P0505)--Idle air control valve or circuit fault
I guess I'll check it tomorrow night to see if the codes have changed again. Any theories out there as to what's going on?
1008 (P0443)--EVAP Canister purge control valve circuit fault
0205 (P0505)--Idle air control valve or circuit fault
I guess I'll check it tomorrow night to see if the codes have changed again. Any theories out there as to what's going on?
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