P0842 Pontiac Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit Low
Quick Answer
The Torque Converter Clutch (TCC) release switch is part of the automatic Transmission Fluid Pressure (TFP) manual valve position switch. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Fluid Pressure Sensor/Switch 'A'. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0842 Pontiac indicates Transmission Fluid Pressure Sensor/Switch 'A' Circuit Low.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Fluid Pressure Sensor/Switch 'A'.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0842 Pontiac Description
When the TCC is released, TCC release fluid pressure opens the TCC release switch which opens the TCC release pressure circuit. When the voltage on the circuit is high (switch open), the Powertrain Control Module (PCM) recognizes that the TCC is no longer engaged.
What are the Possible Causes of the DTC P0842 Pontiac?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Transmission Fluid Pressure Sensor/Switch 'A'
- Transmission Fluid Pressure Sensor/Switch 'A' harness or connectors
- Transmission Fluid Pressure Sensor/Switch 'A' circuit is open or shorted
- Transmission internal mechanical problem
How to Fix the DTC P0842 Pontiac?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
2001-2005 Pontiac Montana
2001-2005 Pontiac Montana EXT
2001-2005 Pontiac Aztek
2001-2005 Pontiac Aztek AWD
2001-2005 Pontiac Bonneville
2001-2008 Pontiac Grand Prix
2002-2005 Pontiac Montana 4WD
2005-2006 Pontiac Montana SV6 (AWD)
2005-2008 Pontiac Montana SV6
2005-2008 Pontiac Montana SV6 EXT
Pontiac Factory Service Bulletin OBDII Code P0842
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0842 Pontiac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0842 Pontiac Code
1. What does the OBDII code P0842 mean for a Pontiac?
P0842 indicates that the Transmission Fluid Pressure Sensor/Switch 'A' circuit has a low voltage reading, which could affect the transmission's operation.
2. What are the common symptoms of code P0842 on a Pontiac?
Symptoms may include transmission slipping, harsh shifting, delayed gear engagement, or the transmission being stuck in one gear (limp mode).
3. What causes code P0842 on a Pontiac?
Common causes include a faulty transmission fluid pressure sensor, damaged wiring or connectors, low transmission fluid levels, or internal transmission issues.
4. Can driving with code P0842 damage my Pontiac’s transmission?
Yes, continuing to drive with this code can lead to further damage to the transmission if the issue isn’t resolved promptly.
5. How do I diagnose code P0842 on my Pontiac?
Start by checking the transmission fluid level and condition, inspecting wiring and connectors for damage, and testing the transmission fluid pressure sensor.
6. How can I fix code P0842 on my Pontiac?
Repairs may involve replacing the transmission fluid pressure sensor, fixing damaged wiring, or addressing internal transmission problems.
7. Is replacing the transmission fluid pressure sensor a common fix for code P0842?
Yes, replacing the sensor is a common solution if it is determined to be faulty after diagnosis.
8. Can low transmission fluid cause code P0842 on a Pontiac?
Yes, insufficient or dirty transmission fluid can trigger this code by causing incorrect pressure readings.
9. What tools are needed to diagnose code P0842 on a Pontiac?
A diagnostic scanner, multimeter, and possibly a transmission pressure gauge are useful for identifying the issue.
10. How much does it typically cost to repair code P0842 on a Pontiac?
Costs vary depending on the cause, but replacing the transmission fluid pressure sensor can range from $100 to $300, including parts and labor.
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