Question about 2004 Chevrolet TrailBlazer

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Repaired wires on fan clutch and the code p0526 is pending

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  • Anonymous Mar 23, 2014

    what is a P0526 trouble code

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  • Chevrolet Master
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CODE PO526 - FAN SPEED SENSOR. POSSIBLE CAUSE WIRING POOR CONNECTION BAD SPEED SENSOR.

Posted on Dec 29, 2010

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Having the same problem on my 2005 TB . 4 month old fan clutch and guess what? It's a dorman should have gone with original one .

Posted on Nov 07, 2013

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Posted on Jan 02, 2017

ryanlutton
  • 1142 Answers

SOURCE: 2004 trailblazer, 2 wheel drive.

A couple of things come to mind. Double check the wiring at the fan clutch, check the whole harness, there is a known problem wth chaffing there. Is it a Dorman brand fan clutch? These have been known to be bad out of the box. The other thing that could be wrong is the actual speed sensor on the new fan clutch. Hope some of this helps.

Posted on May 31, 2011

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1 Answer

P0526 but fan is working fine


it could be a poor signal from the temperature sending unit, some vehicles have two some only one. in vehicles with two one of them runs the gauge and the other is a sender for your fuel and emissions system and triggers the fan. in either case a poor signal or intermittent signal might throw a trouble code. also it could be triggering at a wrong or low temp.

Apr 12, 2012 | Chevrolet Chevette Cars & Trucks

1 Answer

My engine lite stays on, codes P0526 and P0106 are coming up..we replaced the fan clutch but the lite stays on..what else could be wrong with these codes


You don't say if the codes are same after fan clutch replacement, if you still get the P0526, you may have a bad clutch or a defective wire harness.
For the P0106, this is indicating a problem in the MAP sensor area. In order to check the MAP sensor you need a highend scan tool. But before changing anything, do a thorough cleaning of the throttle body first, make sure to clean the front and rear sides. Also disconnect the battery while doing the cleaning, this will reset the computer to factory defaults and allow it to relearn to the cleaned throttle body.

Sep 03, 2011 | 2005 Chevrolet TrailBlazer

1 Answer

MY 04 CHEVY TRAILBLZER HAS CODES P0526 P0141 P2135 P2138


Four seemingly unrelated fault codes;
P0526 - fan speed error
P0141 - downstream O2 sensor lean condition
P2135 - Throttle position sensor fault
P2138 - Accelerator position fault

You need to have a qualified technician diagnose this with a highend scan tool, maybe there is a possibility that a reference voltage is off spec.

Sep 02, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

How long can I drive a trailblaze that has a code of P0526?


This an indication of the fan clutch gone bad or a problem with the wiring harness. The computer controls the speed of the fan by engaging the clutch, without the speed sensor signal being present, the computer can't control the speed so the fan will only spin slowly. If you are driving in very hot weather or heavy traffic, you may encounter an overheating condition.

Jul 25, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

2004 trailblazer, 2 wheel drive. Code P0526, fan clutch circuit. Replaced fan clutch. Still code P0526. Wiring ok. Check Engine Light still on.


A couple of things come to mind. Double check the wiring at the fan clutch, check the whole harness, there is a known problem wth chaffing there. Is it a Dorman brand fan clutch? These have been known to be bad out of the box. The other thing that could be wrong is the actual speed sensor on the new fan clutch. Hope some of this helps.

May 31, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

2004 6 cyl/4.2 chevy blazer.Emissions code p0410.p0526 can any one help me repair these problems myself? also my idle drops and cuts the engine off when i turn on the interior fan .Any assistance would be...


The throttle body needs to be cleaned, grime in this area prevents the throttle plate from closing completely and allowing air to enter, making the air/fuel mixture lean.
Code P0526 is related to the fan clutch, it indicates that the fan speed is not what the PCM commanded. The fan clutch may have to be replaced.

Oct 03, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

I replace the fan clutch and i still have the code p1481 what does that mean? 2002 chevrolet Trailblazer 4.2 Thanks You! Arthur Tyler


TSB#05-06-02-012B: Service Engine Soon (SES) or Check Engine Light On, DTC P0480, P0526/P1481/P1484 Set (Replace Engine Cooling Fan Wiring Harness) - (Oct 19, 2006)
Subject:
Service Engine Soon (SES) or Check Engine Light On,
DTC P0480/P0526/P1481/P1484 Set (Replace Engine Cooling Fan Wiring Harness)
Condition
Some customers may comment that the Service Engine Soon (SES) or Check Engine light is illuminated. This condition may be intermittent and upon investigation, the technician may find either DTC P0480, P0526, P1481 or P1484 set.

Cause
This condition may be caused by the cooling fan harness chaffing against the plastic guide it routes through. This
contact may damage the insulation of the wires enclosed in that harness.

Correction
Replace the engine cooling fan harness using the procedure listed below.

1. Remove the cooling fan. Refer to the Cooling Fan and Shroud Replacement procedure in the Engine Cooling sub-section of SI.

2. Place the cooling fan assembly on a bench.
Disconnect the harness electrical connector from the cooling fan clutch.

3. Remove the harness from the plastic guide while feeding the wires out of the slot.

4. Before installing the new harness, wrap the affected area on the wires with electrical tape to keep the protective sleeve in place. Be sure to keep the tape approximately 25 mm (1 in) away from the connector so the wires can be fed into the slot.

5. Feed the wires into the slot and install the harness to the plastic guide.

6. Connect the harness electrical connector to the cooling fan clutch.

7. Install the cooling fan. Refer to the Cooling Fan and Shroud Replacement procedure in the Engine Cooling sub-section of SI.

Part Number 89024920

Description
Harness Assembly, Engine Cooling Fan Wiring
Thank you for using fixya.

Apr 29, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

Service engine light is on and code P0526


The Powertrain Control Module (PCM) uses the cooling fan speed signal in order to determine the actual fan speed in relation to the desired fan speed. The PCM uses the cooling fan speed signal in order to reduce the cooling fan noise and in order to maintain the powertrain cooling requirements. The PCM supplies power and ground to the clutch hall effect sensor of the cooling fan clutch. The hall effect sensor returns a signal pulse through the speed signal circuit in response to the reluctor track, which is located inside the fan clutch. If during operation, the PCM detects a loss of the cooling fan speed signal, DTC P0526 will set
  • An inline connector could cause an intermittent DTC. Ensure to test for poor connections and pin retention at all inline connectors. Refer to system schematics for connectors and locations.
  • If the condition is not present, refer to Testing for Intermittent and Poor Connections.
  • Disconnect the harness connector of the cooling fan clutch from the shroud. Inspect the exposed wires between the harness connector and the tubing.
  • Inspect the cooling fan clutch harness in order to ensure that the clutch supply voltage circuit is not shorted to the following circuits:
  • The 5-volt reference circuit.
  • The cooling fan speed signal circuit.
  • The low reference circuit.
  • DTC P0526 will set if the engine is started without the drive belt ON.

Mar 05, 2010 | 2004 GMC Envoy

2 Answers

I have a service engine soon light and the code that appeared when check is 1481, do you know what this means?


Service Engine Soon (SES) or Check Engine Light On, DTC P0480, P0526/P1481/P1484 Set (Replace Engine Cooling Fan Wiring Harness) #05-06-02-012B - (10/19/2006)

Models:2004-2006 Buick Rainier
2002-2006 Chevrolet TrailBlazer, TrailBlazer EXT
2002-2006 GMC Envoy, Envoy XL, 

Some customers may comment that the Service Engine Soon (SES) or Check Engine light is illuminated. This condition may be intermittent and upon investigation, the technician may find either DTC P0480, P0526, P1481 or P1484 set.

This condition may be caused by the cooling fan harness chaffing against the plastic guide it routes through. This contact may damage the insulation of the wires enclosed in that harness.

Replace the wire harness: 
Part Number 89024920 Description Harness Assembly, Engine Cooling Fan Wiring

Good luck and keep me posed. 

Aug 11, 2009 | 2003 GMC Envoy

1 Answer

2004 GMC Envoy with a P0526 sensor problem


This code indicates a problem with the fan clutch, the speed it is running is not the speed it was commanded to run/ The fan clutch assembly needs replacing.

Jun 03, 2009 | 2004 GMC Envoy

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