The code P0706: Transmission Range Sensor Circuit Range/Performance points to a problem with the transmission range sensor circuit’s range or performance. This issue can impact how your vehicle’s transmission functions and may lead to drivability concerns. It’s essential to address this code to prevent further complications.
P0706 quick overview
| Meaning | P0706: Transmission Range Sensor Circuit Range/Performance |
| Is it serious? | This code can affect the proper functioning of the transmission, potentially leading to drivability issues. It should be addressed to prevent further problems. |
| Possible causes | – Misadjusted range selector switch – Damaged or corroded wiring or connectors – Faulty transmission range sensor or control module |
| How to diagnose? | Check Range Selector Adjustment: Ensure that the range selector switch is correctly adjusted. Inspect Wiring and Connectors: Examine the wiring and connectors for any damage, corrosion, or loose connections. Replace Transmission Range Sensor/Module: Consider replacing the transmission range sensor or control module if needed. Use Diagnostic Tool: Use a diagnostic tool to read and code the new module correctly. |
P0706 Meaning
In simple terms, the P0706 code indicates that there’s a problem with a component in your vehicle that helps it understand which gear it’s in. Imagine it as the car’s way of knowing whether it’s in park, reverse, drive, or another gear. When this component doesn’t work correctly, it can affect how smoothly your car shifts gears and how it drives. It’s like your car trying to guess which gear to use, which can lead to issues with acceleration and overall performance. So, while it may not cause an immediate breakdown, it’s essential to fix it to keep your car running smoothly.
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How to fix P0706 – learn from mechanics
I looked into P0706 service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.
Case #1: Chevrolet
Vehicle Information: 2006 Chevrolet Silverado 2500 HD LT 6.6L
Issue + Repair History: Customer came in 4 months ago with code P0706 indicating a bad ground on the number six glow plug. Technician replaced the glow plug, cleaned off the wiring, and replaced the wire end to address the issue. The same code (P0706) has reappeared.
Other OBD2 Codes + Test Results: P0706 – Transmission Range Sensor Circuit Range/Performance
Suggestions to Fix Issue: Initially addressed a P0706 code related to a bad ground on the number six glow plug. Community members pointed out that P0706 is a transmission range sensor code, not related to glow plugs. Suggested that code P0670 might be a new glow plug control module.
Final Fix: The issue was resolved by identifying that the P0706 code was unrelated to the glow plug. It was a transmission range sensor circuit code. The technician discovered that a controller was the problem, and after replacing it, the issue was resolved.
Case #2: Oldsmobile
Vehicle Information: 1996 Oldsmobile Cutlass Ciera 3.1L
Issue + Repair History: Immediate code P0706 and P1374 appeared. P0706 showed up immediately, and P1374 occurred when the engine speed exceeded 1200 rpm. DSO used to check 24x, 7x, and cam signals at the computer plug; all signals were good. PRNDL switch signals at the PCM plug were checked, and all wires were accurate for all ranges. Suspected a bad PCM but sought a second opinion before considering PCM replacement. Took the car to the dealership for further diagnosis.
Other OBD2 Codes + Test Results: P0706 – Transmission Range Indicator out of range P1374 – 3x error
Suggestions to Fix Issue: No specific suggestions were provided by the community.
Final Fix: The issue was resolved by taking the car to the dealership. They replaced the PCM and reprogrammed it. After this repair, the codes (P0706 and P1374) did not return, and the car was running perfectly.
Case #3: Dodge
Vehicle Information: 2008 Dodge Avenger SXT 2.4L
Issue + Repair History: Car was towed in for a no-start, no-crank issue. Code P0706 was found. Replaced the transmission range sensor twice with dealer parts. Despite the sensor replacement, the car still wouldn’t start or crank. Checked for an open circuit between the CPU and transmission range sensor, but found nothing. Considered the possibility of a faulty PCM.
Other OBD2 Codes + Test Results: P0706 – Transmission range sensor fault
Suggestions to Fix Issue:
- Verify if the TRS (Transmission Range Sensor) is correctly adjusted as per the shop manual.
- Use a scan tool to check if the TRS reads P R D when the key is turned on.
- Test if the TRS sensor reads P R D when the key is turned to the start position.
- Perform the flow chart for code P0706, recording all readings for each step.
Final Fix: The issue was resolved by discovering that another shop had previously replaced the starter but left the starter bolts loose, including the main ground connection. Fixing the loose ground connection resolved the no-start, no-crank problem.
Case #4: Saturn
Vehicle Information: 1996 Saturn SL1 1.9L
Issue + Repair History: The Saturn has an intermittent occurrence of code P0706. Freeze data indicates the problem occurs at 32 mph during both events that stored. Troubleshooting chart suggests the code will set if the car starts in anything but P/N. The customer has no drivability complaints. Suspected that when this code sets, the vehicle should take off in 2nd gear. Searched for TSBs and the knowledge base, but found nothing matching the symptoms.
Other OBD2 Codes + Test Results: P0706 – Transmission Range invalid
Suggestions to Fix Issue:
- Inspect wiring.
- Check the adjustment of the range selector switch.
- If the problem persists, consider replacing the switch.
Final Fix: The issue was resolved by replacing the range selector switch. This fixed the intermittent occurrence of code P0706, and the problem hasn’t recurred since the switch replacement. Testing was challenging because the issue was intermittent, and all tests appeared normal during testing.
Case #5: Audi
Vehicle Information: 2005 Audi A4 3.0L
Issue + Repair History: The customer reported that the shifter flashes at times but did not experience driving problems. VagCom code 17090, P0706 – Transmission Range Sensor implausible signal, intermittent. Dealer suggested that the control module in the transmission is likely bad and that they tend to fail often. Mitchell has no information on this CVT transmission.
Other OBD2 Codes + Test Results: VagCom Scan – 17090, P0706
Suggestions to Fix Issue:
- The control module is mounted on the rear of the transmission, and it is a special order part.
- Vag-Com should be able to code it without any problems.
- Before removing the old module, write down the old code and enter it for the new one.
- Consider performing a fluid change for the transmission, as it’s a good idea for these transmissions.
Final Fix: The issue was resolved by ordering a new control module for the transmission. Vag-Com was used to code it without any problems. The control module is mounted on the rear of the transmission, and it’s a special order part. It’s important to write down the old code before replacing it with the new module. Additionally, performing a fluid change for the transmission is recommended, as it can help maintain the transmission’s health.
How to diagnose P0706
I made you an overview of solving this DTC, based on all the advice that was suggested by certified mechanics to address this issue in previously mentioned service cases.
| Advice | Diagnostic Step |
|---|---|
| Check the adjustment of the range selector switch | Verify that the range selector switch is properly adjusted. |
| Inspect wiring and connectors | Examine the wiring and connectors for any damage or issues. |
| Replace the transmission range sensor/module | Consider replacing the transmission range sensor or control module if necessary. |
| Use a diagnostic tool (e.g., VagCom) | Utilize a diagnostic tool to read and code the new module correctly. |
| Perform a fluid change (for CVT transmissions) | If dealing with a CVT transmission, consider performing a fluid change. |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko